Avec trois valeurs numériques (éléments rouge, vert et bleu d’une couleur (huit bits par canal, de 0 à 255)), votre programme doit indiquer le nom de la couleur donnée.

Par exemple;

Input:  255, 0, 0  
Output: Red

ou;

Input:  80, 0, 0
Output: Dark Red

Il s’agit d’un concours de popularité, quelle que soit la réponse ayant obtenu le plus grand nombre de votes avant le premier juillet.

Ispired by: Afficher la couleur RVB en entrée

Python

Il s’agit d’un script Python qui utilise les résultats de Color Survey de xkcd , dans lequel Randall Munroe a posé exactement la même question à des milliers de personnes. Il est arrivé au tableau suivant:

L'enquête contient uniquement des données sur les couleurs complètement saturées (je suppose que les couleurs non saturées seraient toutes décrites comme étant «grisâtres»). Cela signifie que nous devons faire quelques astuces liées aux couleurs pour forcer notre entrée à devenir complètement saturée.

Ce que j'ai fait ici est simplement de convertir la couleur d'entrée en HSV, d'augmenter la saturation et de l'appeler un jour. Ce n'est probablement pas très correct du point de vue de la perception des couleurs, mais cela fonctionne assez bien ici - et c'est assez simple pour que vous n'ayez besoin que de la bibliothèque standard. Piles incluses en effet.

Le script s'attend à ce que satfaces.txt, à partir d' ici ( miroir ), soit dans le répertoire en cours.

import sys, colorsys

n = (int(sys.argv[1], 16))
r = ((n & 0xff0000) >> 16) / 255.0
g = ((n & 0x00ff00) >> 8) / 255.0
b = ((n & 0x0000ff)) / 255.0

(h, s, v) = colorsys.rgb_to_hsv(r, g, b)
(r, g, b) = colorsys.hsv_to_rgb(h, 1, v)

match = "[{}, {}, {}]".format(int(r*255), int(g*255), int(b*255))

for line in open("satfaces.txt"):
    if line.startswith(match):
        print("You were thinking of: " + line.split("] ")[1].strip())
        break

Quelques exemples de courses:

$ python color.py CEB301
You were thinking of: yellow
$ python color.py CC9900
You were thinking of: orange
$ python color.py CC0000
You were thinking of: red
$ python color.py 0077FF
You were thinking of: blue

Et voici les couleurs:

Je dirais que c'est assez proche.

Mettre à jour avec l'interface graphique!

Je prends la liste de couleurs de cette page Wikipedia (et des pages associées).

J'ai également inclus des NLG pour obtenir des résultats du type "Rose bulgare avec un peu moins de vert et de bleu" et quelques variantes. Essayez de jouer avec vous pour voir si vous pouvez deviner la vraie "Rose bulgare" en utilisant ces retours. :)

L'algorithme essaiera de trouver la couleur la plus proche de l'entrée, telle que définie par la distance euclidienne. Ainsi, vous pouvez entrer n’importe quel triplet de nombres et cela donnera la couleur la plus proche de ce triplet.

(le code accepte les valeurs "séparé par des virgules", "séparé par des espaces" ou "séparé par des virgules")

Attention

Ce code se connecte à Wikipedia et nécessite donc une connexion Internet pour pouvoir s'exécuter pour la première fois (et écrire les informations dans un fichier du même dictionnaire). Les temps suivants, cependant, il sera lu dans le fichier. Si vous voulez la version hors connexion, le code est disponible sur ce lien Ideone (avec un exemple d'exécution).

Code:

import re, os
from bs4 import BeautifulSoup as BS
import requests
import cPickle as pickle
import random

def encode_color(text):
    return tuple(map(int, re.split(', |,| ', text)))

def color_name(col):
    global color_map, color_nums
    arr = color_nums
    closest = None
    min_dist = 10**8
    for color in arr:
        dist = sum((color[i]-col[i])**2 for i in range(3))
        if dist < min_dist:
            closest = color
            min_dist = dist
    result = color_map[closest]
    rgb = ['red', 'green', 'blue']
    slightly_more = ['with a hint of', 'with traces of', 'with slightly more']
    slightly_less = ['with subdued', 'with slightly less']
    more_more = ['with more', 'with strong hint of']
    more_less = ['with less', 'with diminished']
    count = 0
    adds = ['','']
    for i in range(3):
        expl_list = ['']
        if 5 < col[i]-closest[i] < 10:
            expl_list = slightly_more
            count += 1
            add_idx = 0
        elif 10 <= col[i]-closest[i]:
            expl_list = more_more
            count += 2
            add_idx = 0
        elif -10 <= col[i]-closest[i] < -5:
            expl_list = slightly_less
            count -= 1
            add_idx = 1
        elif col[i]-closest[i] <= -10:
            expl_list = more_less
            count -= 2
            add_idx = 1
        expl = expl_list[random.randint(0, len(expl_list)-1)]
        if expl is not '':
            if adds[add_idx] is '':
                adds[add_idx] += ' %s %s' % (expl, rgb[i])
            else:
                adds[add_idx] += ' and %s' % rgb[i]
    if 3 <= count <= 4:
        result = 'A slightly brighter '+result
    elif 4 < count:
        result = 'A brighter '+result
    elif -4 <= count <= -3:
        result = 'A slightly darker '+result
    elif count < -4:
        result = 'A darker '+result
    elif count > 0:
        result += adds[0]
    elif count < 0:
        result += adds[1]
    return result

links = ['http://en.wikipedia.org/wiki/List_of_colors:_A%E2%80%93F',
         'http://en.wikipedia.org/wiki/List_of_colors:_G%E2%80%93M',
         'http://en.wikipedia.org/wiki/List_of_colors:_N%E2%80%93Z']

def is_color(tag):
    return tag.name == 'th' and len(tag.contents)==1 and tag.contents[0].name=='a'

def parse_color(hexa):
    return (int(hexa[0:2], 16), int(hexa[2:4], 16), int(hexa[4:6], 16))

print 'Loading color names...'
if os.path.exists('parse_wiki_color.pickle'):
    with open('parse_wiki_color.pickle', 'rb') as infile:
        color_map, color_nums = pickle.load(infile)
else:
    color_map = {}
    color_nums = []
    for link in links:
        soup = BS(requests.get(link).text,'lxml')
        for color in soup.find_all(is_color):
            try:
                color_num = parse_color(color.next_sibling.next_sibling.string[1:])
                color_nums.append(color_num)
                color_map[color_num] = str(color.a.string)
            except:
                continue
    color_nums = sorted(color_nums)
    with open('parse_wiki_color.pickle', 'wb') as outfile:
        pickle.dump((color_map, color_nums), outfile, protocol=2)
print 'Color names loaded'

def main(event=None):
    global var, col_name, col_disp
    text = var.get()
    color = encode_color(text)
    result = color_name(color)
    col_name.set(result)
    col_rgb.set(color)
    var.set('')
    col_disp.configure(background='#%02x%02x%02x' % color)

from Tkinter import *
root = Tk()
frame = Frame(root)
frame.pack()
caption = Label(frame, text='Enter RGB color:')
caption.pack(side=LEFT)
var = StringVar()
entry = Entry(frame, textvariable=var)
entry.focus_set()
entry.pack(side=LEFT)
entry.bind('<Return>',func=main)
button = Button(frame, text='Get name', command=main)
button.pack(side=LEFT)
col_rgb = StringVar()
col_rgb_disp = Label(root, textvariable=col_rgb)
col_rgb_disp.pack()
col_name = StringVar()
col_label = Label(root, textvariable=col_name)
col_label.pack()
col_disp = Label(root)
col_disp.configure(padx=50, pady=45, relief=RAISED)
col_disp.pack()
root.geometry('400x200')
root.mainloop()

JavaScript

La fonction suivante est écrite en pensant aux utilisateurs canins:

function getColorName(r, g, b) {
    return "gray";
}

Pour les chiens les plus raffinés:

function getColorName(r, g, b) {
    var gray = (0.21*r + 0.71*g + 0.07*b);
    if (gray < 64)
        return "black";
    else if (gray < 128)
        return "dark gray";
    else if (gray < 192)
        return "light gray";
    else if (gray < 256)
        return "white";
    else
        whimper();
}

Javascript

window.location = 'http://www.color-hex.com/color/' + 'ff00ff'

Mathematica

Mise à jour: ajout d'un paramètre permettant de définir le nombre de couleurs les plus proches à afficher. La valeur par défaut est 5 couleurs.

Étant donné les valeurs RVB d'une couleur sans nom, les éléments suivants trouvent les ncouleurs les plus proches dans une liste de 140 noms de couleurs HTML. Il trace ensuite la couleur sans nom et ses 5 voisins les plus proches dans un espace à 3, avec des axes pour le rouge, le vert et le bleu. Dans l'étiquette de tracé, il nomme la couleur la plus proche et fournit ses valeurs RVB.

colorInterpret[rgb_,n_: 5]:=
Module[{colorData,valsRGB,pts,closest},
colorData=({ColorData["HTML",#],#}&/@ColorData["HTML","Range"][[1]])/.{RGBColor[x__]:> {x}};
valsRGB=colorData[[All,1]];
pts=Append[colorData[[Position[valsRGB,#]&/@Nearest[valsRGB,rgb,n]//Flatten]],{rgb,"Unnamed Color"}];
closest=pts[[1]];
Graphics3D[{PointSize[.05],
{RGBColor@@#,Point[#],Text[Style[#2,Black,14],(#-{.01,.01,.01})]}&@@@pts
},
Axes-> True,
PlotLabel-> Row[{"closest color: ", closest}],
ImageSize-> 600,
ImagePadding-> 50,
BaseStyle-> 14,
AxesLabel->{Style["Red",18],Style["Green",18],Style["Blue",18]}]]

Exemples

Afficher les 5 couleurs les plus proches:

 colorInterpret[{.55, .86, .69}]

Afficher les 15 couleurs les plus proches:

CJam

l~]:X;"xkcd.com/color/rgb.txt"gN%"  "f%{[1=1>eu2/{:~Gb}%X]z{:-}%2f#:+}$0=0=

Ceci obtient la liste de couleurs de xkcd et trouve la plus proche.
Remarque: la chaîne d'espace au milieu est en fait un seul onglet.

Pour l’exécuter, veuillez utiliser l’interprète de http://sf.net/p/cjam

Exemple:

Entrée 147 125 0
sortiebaby poop

R

R possède une liste incorporée de 657 noms de couleurs à des fins de traçage. Le code suivant prend une entrée de l’utilisateur, calcule la distance entre cette entrée rgb et la valeur rgb de ces 657 couleurs et affiche le nom de la plus proche.

a=as.integer(strsplit(readline(),", ")[[1]]);color_list=sapply(colors(),col2rgb);names(which.min(colSums(abs(apply(color_list,2,function(x)x-a)))))

Ungolfed:

a <- as.integer(strsplit(readline(),", ")[[1]]) #Ask user input as stdin, and process it
color_list <- sapply(colors(),col2rgb) #Convert the color name list into an RGB matrix
#Computes the difference with user input, adds the absolute value and output the name of the element with the minimal value
names(which.min(colSums(abs(apply(color_list, 2, function(x)x-a)))))

Exemples:

> a=as.integer(strsplit(readline(),", ")[[1]]);color_list=sapply(colors(),col2rgb);names(which.min(colSums(abs(apply(color_list,2,function(x)x-a)))))
80, 0, 2
[1] "darkred"
> a=as.integer(strsplit(readline(),", ")[[1]]);color_list=sapply(colors(),col2rgb);names(which.min(colSums(abs(apply(color_list,2,function(x)x-a)))))
150, 150, 150
[1] "gray59"
> a=as.integer(strsplit(readline(),", ")[[1]]);color_list=sapply(colors(),col2rgb);names(which.min(colSums(abs(apply(color_list,2,function(x)x-a)))))
0, 200, 255
[1] "deepskyblue"
> a=as.integer(strsplit(readline(),", ")[[1]]);color_list=sapply(colors(),col2rgb);names(which.min(colSums(abs(apply(color_list,2,function(x)x-a)))))
255, 100, 70
[1] "tomato"

Edit: Idée identique mais en utilisant la liste de noms de colorHexa :

a=strsplit(xpathSApply(htmlParse("http://www.colorhexa.com/color-names"),"//li",xmlValue),"#")
n=sapply(a,`[`,1)
r=apply(do.call(rbind,strsplit(sapply(a,`[`,2)," "))[,2:4],2,as.integer)
n[which.min(colSums(abs(apply(r,1,`-`,as.integer(strsplit(readline(),", ")[[1]])))))]

Exemple:

> a=strsplit(xpathSApply(htmlParse("http://www.colorhexa.com/color-names"),"//li",xmlValue),"#")
> n=sapply(a,`[`,1)
> r=apply(do.call(rbind,strsplit(sapply(a,`[`,2)," "))[,2:4],2,as.integer)
> n[which.min(colSums(abs(apply(r,1,`-`,as.integer(strsplit(readline(),", ")[[1]])))))]
208, 32, 12
[1] " Fire engine red "

Perl

Attend http://xkcd.com/color/rgb.txtdans le répertoire en cours. Affiche les cinq couleurs les plus proches avec un pourcentage intéressant.

Exemple d'exécution

> perl code.pl
147,125,0
99.87% baby poop
98.44% yellowish brown
98.31% puke brown
97.79% poo
97.27% diarrhea

Code

#!perl -w
use strict;

sub hex2rgb ($) {
    my ($h) = @_;
    map {hex} ($h=~/[0-9a-fA-F]{2}/g)
}

sub distance ($$) {
    my ($acol1, $acol2) = @_;
    my $r = 0;
    $r += abs($acol1->[$_] - $acol2->[$_]) for (0..$#$acol1);
    $r
}

sub read_rgb {
    open my $rgb, '<', 'rgb.txt' or die $!;
    my @col;
    while (<$rgb>) {
    my ($name, $hex) = split /\t#/;
    my @rgb = hex2rgb $hex;
    push @col, [@rgb, $name];
    }
    close $rgb;
    \@col
}

my $acolours = read_rgb;
my @C = split /, */, <>;

printf "%.02f%% %s\n", (768-$_->[0])/768*100, $_->[4] for 
    (sort {$a->[0] <=> $b->[0]} 
     map [distance(\@C, $_), @$_], @$acolours)[0..4];

Scala

Ma tentative - la principale caractéristique est qu’il n’exige pas de connexion Internet! (J'espère que ce n'est pas trop long: D) De plus, j'ai convoqué Chtulhu lors de la préparation de la base de données de couleurs (car j'ai analysé un sous-ensemble de HTML avec regex; les expressions rationnelles et le lien vers la source sont en commentaires)

Edit: amélioration de la précision

Exemple d'exécution: http://ideone.com/e3n0dG

object Main {

  def main(args: Array[String]) {
    val color = extractBrightness(readLine().split("[, ]+").map(_.toInt))

    val nearestColor = colors.minBy(t => distance(extractBrightness(parseColor(t._1)), color, weight))._2
    println(s"Your color is $nearestColor")
  }

  def parseColor(s: String) = {
    s.sliding(2, 2).map(Integer.parseInt(_, 16)).toVector
  }

  def distance(c1: Seq[Double], c2: Seq[Double], weight: Seq[Double]) = {
    c1.zip(c2).map(t => ((x: Double) => x * x)(t._1 - t._2)).zip(weight).map(t => t._1 * t._2).sum
  }

  val weight = Vector(0.01, 1.0, 0.8)

  def extractBrightness(c: Seq[Int]) = {
    val Seq(r, g, b) = c
    val brightness = c.sum.toDouble / 3
    val rOffset = r - brightness
    val bOffset = b - brightness
    Seq(brightness, rOffset, bOffset)
  }

  // colors are extracted by using this regex: <li>[\s\S]*?<a href="/......">([\w ]+)</a>[\s\S]*?<a href="/......">#(......)</a>[\s\S]*?</li>
  // from this page: http://www.colorhexa.com/color-names
  val colors = Vector(
    "5d8aa8" -> "Air Force blue",
    "f0f8ff" -> "Alice blue",
    "e32636" -> "Alizarin crimson",
    "efdecd" -> "Almond",
    "e52b50" -> "Amaranth",
    "ffbf00" -> "Amber",
    "ff033e" -> "American rose",
    "9966cc" -> "Amethyst",
    "a4c639" -> "Android Green",
    "cd9575" -> "Antique brass",
    "915c83" -> "Antique fuchsia",
    "faebd7" -> "Antique white",
    "008000" -> "Ao",
    "8db600" -> "Apple green",
    "fbceb1" -> "Apricot",
    "00ffff" -> "Aqua",
    "7fffd4" -> "Aquamarine",
    "4b5320" -> "Army green",
    "e9d66b" -> "Arylide yellow",
    "b2beb5" -> "Ash grey",
    "87a96b" -> "Asparagus",
    "ff9966" -> "Atomic tangerine",
    "a52a2a" -> "Auburn",
    "fdee00" -> "Aureolin",
    "6e7f80" -> "AuroMetalSaurus",
    "ff2052" -> "Awesome",
    "007fff" -> "Azure",
    "89cff0" -> "Baby blue",
    "a1caf1" -> "Baby blue eyes",
    "f4c2c2" -> "Baby pink",
    "21abcd" -> "Ball Blue",
    "fae7b5" -> "Banana Mania",
    "ffe135" -> "Banana yellow",
    "848482" -> "Battleship grey",
    "98777b" -> "Bazaar",
    "bcd4e6" -> "Beau blue",
    "9f8170" -> "Beaver",
    "f5f5dc" -> "Beige",
    "ffe4c4" -> "Bisque",
    "3d2b1f" -> "Bistre",
    "fe6f5e" -> "Bittersweet",
    "000000" -> "Black",
    "ffebcd" -> "Blanched Almond",
    "318ce7" -> "Bleu de France",
    "ace5ee" -> "Blizzard Blue",
    "faf0be" -> "Blond",
    "0000ff" -> "Blue",
    "a2a2d0" -> "Blue Bell",
    "6699cc" -> "Blue Gray",
    "0d98ba" -> "Blue green",
    "8a2be2" -> "Blue purple",
    "8a2be2" -> "Blue violet",
    "de5d83" -> "Blush",
    "79443b" -> "Bole",
    "0095b6" -> "Bondi blue",
    "e3dac9" -> "Bone",
    "cc0000" -> "Boston University Red",
    "006a4e" -> "Bottle green",
    "873260" -> "Boysenberry",
    "0070ff" -> "Brandeis blue",
    "b5a642" -> "Brass",
    "cb4154" -> "Brick red",
    "1dacd6" -> "Bright cerulean",
    "66ff00" -> "Bright green",
    "bf94e4" -> "Bright lavender",
    "c32148" -> "Bright maroon",
    "ff007f" -> "Bright pink",
    "08e8de" -> "Bright turquoise",
    "d19fe8" -> "Bright ube",
    "f4bbff" -> "Brilliant lavender",
    "ff55a3" -> "Brilliant rose",
    "fb607f" -> "Brink pink",
    "004225" -> "British racing green",
    "cd7f32" -> "Bronze",
    "a52a2a" -> "Brown",
    "ffc1cc" -> "Bubble gum",
    "e7feff" -> "Bubbles",
    "f0dc82" -> "Buff",
    "480607" -> "Bulgarian rose",
    "800020" -> "Burgundy",
    "deb887" -> "Burlywood",
    "cc5500" -> "Burnt orange",
    "e97451" -> "Burnt sienna",
    "8a3324" -> "Burnt umber",
    "bd33a4" -> "Byzantine",
    "702963" -> "Byzantium",
    "007aa5" -> "CG Blue",
    "e03c31" -> "CG Red",
    "536872" -> "Cadet",
    "5f9ea0" -> "Cadet blue",
    "91a3b0" -> "Cadet grey",
    "006b3c" -> "Cadmium green",
    "ed872d" -> "Cadmium orange",
    "e30022" -> "Cadmium red",
    "fff600" -> "Cadmium yellow",
    "a67b5b" -> "Café au lait",
    "4b3621" -> "Café noir",
    "1e4d2b" -> "Cal Poly Pomona green",
    "a3c1ad" -> "Cambridge Blue",
    "c19a6b" -> "Camel",
    "78866b" -> "Camouflage green",
    "ffff99" -> "Canary",
    "ffef00" -> "Canary yellow",
    "ff0800" -> "Candy apple red",
    "e4717a" -> "Candy pink",
    "00bfff" -> "Capri",
    "592720" -> "Caput mortuum",
    "c41e3a" -> "Cardinal",
    "00cc99" -> "Caribbean green",
    "ff0040" -> "Carmine",
    "eb4c42" -> "Carmine pink",
    "ff0038" -> "Carmine red",
    "ffa6c9" -> "Carnation pink",
    "b31b1b" -> "Carnelian",
    "99badd" -> "Carolina blue",
    "ed9121" -> "Carrot orange",
    "ace1af" -> "Celadon",
    "b2ffff" -> "Celeste",
    "4997d0" -> "Celestial blue",
    "de3163" -> "Cerise",
    "ec3b83" -> "Cerise pink",
    "007ba7" -> "Cerulean",
    "2a52be" -> "Cerulean blue",
    "a0785a" -> "Chamoisee",
    "fad6a5" -> "Champagne",
    "36454f" -> "Charcoal",
    "7fff00" -> "Chartreuse",
    "de3163" -> "Cherry",
    "ffb7c5" -> "Cherry blossom pink",
    "cd5c5c" -> "Chestnut",
    "d2691e" -> "Chocolate",
    "ffa700" -> "Chrome yellow",
    "98817b" -> "Cinereous",
    "e34234" -> "Cinnabar",
    "d2691e" -> "Cinnamon",
    "e4d00a" -> "Citrine",
    "fbcce7" -> "Classic rose",
    "0047ab" -> "Cobalt",
    "d2691e" -> "Cocoa brown",
    "6f4e37" -> "Coffee",
    "9bddff" -> "Columbia blue",
    "002e63" -> "Cool black",
    "8c92ac" -> "Cool grey",
    "b87333" -> "Copper",
    "996666" -> "Copper rose",
    "ff3800" -> "Coquelicot",
    "ff7f50" -> "Coral",
    "f88379" -> "Coral pink",
    "ff4040" -> "Coral red",
    "893f45" -> "Cordovan",
    "fbec5d" -> "Corn",
    "b31b1b" -> "Cornell Red",
    "9aceeb" -> "Cornflower",
    "6495ed" -> "Cornflower blue",
    "fff8dc" -> "Cornsilk",
    "fff8e7" -> "Cosmic latte",
    "ffbcd9" -> "Cotton candy",
    "fffdd0" -> "Cream",
    "dc143c" -> "Crimson",
    "990000" -> "Crimson Red",
    "be0032" -> "Crimson glory",
    "00ffff" -> "Cyan",
    "ffff31" -> "Daffodil",
    "f0e130" -> "Dandelion",
    "00008b" -> "Dark blue",
    "654321" -> "Dark brown",
    "5d3954" -> "Dark byzantium",
    "a40000" -> "Dark candy apple red",
    "08457e" -> "Dark cerulean",
    "986960" -> "Dark chestnut",
    "cd5b45" -> "Dark coral",
    "008b8b" -> "Dark cyan",
    "536878" -> "Dark electric blue",
    "b8860b" -> "Dark goldenrod",
    "a9a9a9" -> "Dark gray",
    "013220" -> "Dark green",
    "1a2421" -> "Dark jungle green",
    "bdb76b" -> "Dark khaki",
    "483c32" -> "Dark lava",
    "734f96" -> "Dark lavender",
    "8b008b" -> "Dark magenta",
    "003366" -> "Dark midnight blue",
    "556b2f" -> "Dark olive green",
    "ff8c00" -> "Dark orange",
    "9932cc" -> "Dark orchid",
    "779ecb" -> "Dark pastel blue",
    "03c03c" -> "Dark pastel green",
    "966fd6" -> "Dark pastel purple",
    "c23b22" -> "Dark pastel red",
    "e75480" -> "Dark pink",
    "003399" -> "Dark powder blue",
    "872657" -> "Dark raspberry",
    "8b0000" -> "Dark red",
    "e9967a" -> "Dark salmon",
    "560319" -> "Dark scarlet",
    "8fbc8f" -> "Dark sea green",
    "3c1414" -> "Dark sienna",
    "483d8b" -> "Dark slate blue",
    "2f4f4f" -> "Dark slate gray",
    "177245" -> "Dark spring green",
    "918151" -> "Dark tan",
    "ffa812" -> "Dark tangerine",
    "483c32" -> "Dark taupe",
    "cc4e5c" -> "Dark terra cotta",
    "00ced1" -> "Dark turquoise",
    "9400d3" -> "Dark violet",
    "00693e" -> "Dartmouth green",
    "555555" -> "Davy grey",
    "d70a53" -> "Debian red",
    "a9203e" -> "Deep carmine",
    "ef3038" -> "Deep carmine pink",
    "e9692c" -> "Deep carrot orange",
    "da3287" -> "Deep cerise",
    "fad6a5" -> "Deep champagne",
    "b94e48" -> "Deep chestnut",
    "704241" -> "Deep coffee",
    "c154c1" -> "Deep fuchsia",
    "004b49" -> "Deep jungle green",
    "9955bb" -> "Deep lilac",
    "cc00cc" -> "Deep magenta",
    "ffcba4" -> "Deep peach",
    "ff1493" -> "Deep pink",
    "ff9933" -> "Deep saffron",
    "00bfff" -> "Deep sky blue",
    "1560bd" -> "Denim",
    "c19a6b" -> "Desert",
    "edc9af" -> "Desert sand",
    "696969" -> "Dim gray",
    "1e90ff" -> "Dodger blue",
    "d71868" -> "Dogwood rose",
    "85bb65" -> "Dollar bill",
    "967117" -> "Drab",
    "00009c" -> "Duke blue",
    "e1a95f" -> "Earth yellow",
    "c2b280" -> "Ecru",
    "614051" -> "Eggplant",
    "f0ead6" -> "Eggshell",
    "1034a6" -> "Egyptian blue",
    "7df9ff" -> "Electric blue",
    "ff003f" -> "Electric crimson",
    "00ffff" -> "Electric cyan",
    "00ff00" -> "Electric green",
    "6f00ff" -> "Electric indigo",
    "f4bbff" -> "Electric lavender",
    "ccff00" -> "Electric lime",
    "bf00ff" -> "Electric purple",
    "3f00ff" -> "Electric ultramarine",
    "8f00ff" -> "Electric violet",
    "ffff00" -> "Electric yellow",
    "50c878" -> "Emerald",
    "96c8a2" -> "Eton blue",
    "c19a6b" -> "Fallow",
    "801818" -> "Falu red",
    "ff00ff" -> "Famous",
    "b53389" -> "Fandango",
    "f400a1" -> "Fashion fuchsia",
    "e5aa70" -> "Fawn",
    "4d5d53" -> "Feldgrau",
    "71bc78" -> "Fern",
    "4f7942" -> "Fern green",
    "ff2800" -> "Ferrari Red",
    "6c541e" -> "Field drab",
    "ce2029" -> "Fire engine red",
    "b22222" -> "Firebrick",
    "e25822" -> "Flame",
    "fc8eac" -> "Flamingo pink",
    "f7e98e" -> "Flavescent",
    "eedc82" -> "Flax",
    "fffaf0" -> "Floral white",
    "ffbf00" -> "Fluorescent orange",
    "ff1493" -> "Fluorescent pink",
    "ccff00" -> "Fluorescent yellow",
    "ff004f" -> "Folly",
    "228b22" -> "Forest green",
    "a67b5b" -> "French beige",
    "0072bb" -> "French blue",
    "86608e" -> "French lilac",
    "f64a8a" -> "French rose",
    "ff00ff" -> "Fuchsia",
    "ff77ff" -> "Fuchsia pink",
    "e48400" -> "Fulvous",
    "cc6666" -> "Fuzzy Wuzzy",
    "dcdcdc" -> "Gainsboro",
    "e49b0f" -> "Gamboge",
    "f8f8ff" -> "Ghost white",
    "b06500" -> "Ginger",
    "6082b6" -> "Glaucous",
    "e6e8fa" -> "Glitter",
    "ffd700" -> "Gold",
    "996515" -> "Golden brown",
    "fcc200" -> "Golden poppy",
    "ffdf00" -> "Golden yellow",
    "daa520" -> "Goldenrod",
    "a8e4a0" -> "Granny Smith Apple",
    "808080" -> "Gray",
    "465945" -> "Gray asparagus",
    "00ff00" -> "Green",
    "1164b4" -> "Green Blue",
    "adff2f" -> "Green yellow",
    "a99a86" -> "Grullo",
    "00ff7f" -> "Guppie green",
    "663854" -> "Halayà úbe",
    "446ccf" -> "Han blue",
    "5218fa" -> "Han purple",
    "e9d66b" -> "Hansa yellow",
    "3fff00" -> "Harlequin",
    "c90016" -> "Harvard crimson",
    "da9100" -> "Harvest Gold",
    "808000" -> "Heart Gold",
    "df73ff" -> "Heliotrope",
    "f400a1" -> "Hollywood cerise",
    "f0fff0" -> "Honeydew",
    "49796b" -> "Hooker green",
    "ff1dce" -> "Hot magenta",
    "ff69b4" -> "Hot pink",
    "355e3b" -> "Hunter green",
    "fcf75e" -> "Icterine",
    "b2ec5d" -> "Inchworm",
    "138808" -> "India green",
    "cd5c5c" -> "Indian red",
    "e3a857" -> "Indian yellow",
    "4b0082" -> "Indigo",
    "002fa7" -> "International Klein Blue",
    "ff4f00" -> "International orange",
    "5a4fcf" -> "Iris",
    "f4f0ec" -> "Isabelline",
    "009000" -> "Islamic green",
    "fffff0" -> "Ivory",
    "00a86b" -> "Jade",
    "f8de7e" -> "Jasmine",
    "d73b3e" -> "Jasper",
    "a50b5e" -> "Jazzberry jam",
    "fada5e" -> "Jonquil",
    "bdda57" -> "June bud",
    "29ab87" -> "Jungle green",
    "e8000d" -> "KU Crimson",
    "4cbb17" -> "Kelly green",
    "c3b091" -> "Khaki",
    "087830" -> "La Salle Green",
    "d6cadd" -> "Languid lavender",
    "26619c" -> "Lapis lazuli",
    "fefe22" -> "Laser Lemon",
    "a9ba9d" -> "Laurel green",
    "cf1020" -> "Lava",
    "e6e6fa" -> "Lavender",
    "ccccff" -> "Lavender blue",
    "fff0f5" -> "Lavender blush",
    "c4c3d0" -> "Lavender gray",
    "9457eb" -> "Lavender indigo",
    "ee82ee" -> "Lavender magenta",
    "e6e6fa" -> "Lavender mist",
    "fbaed2" -> "Lavender pink",
    "967bb6" -> "Lavender purple",
    "fba0e3" -> "Lavender rose",
    "7cfc00" -> "Lawn green",
    "fff700" -> "Lemon",
    "fff44f" -> "Lemon Yellow",
    "fffacd" -> "Lemon chiffon",
    "bfff00" -> "Lemon lime",
    "f56991" -> "Light Crimson",
    "e68fac" -> "Light Thulian pink",
    "fdd5b1" -> "Light apricot",
    "add8e6" -> "Light blue",
    "b5651d" -> "Light brown",
    "e66771" -> "Light carmine pink",
    "f08080" -> "Light coral",
    "93ccea" -> "Light cornflower blue",
    "e0ffff" -> "Light cyan",
    "f984ef" -> "Light fuchsia pink",
    "fafad2" -> "Light goldenrod yellow",
    "d3d3d3" -> "Light gray",
    "90ee90" -> "Light green",
    "f0e68c" -> "Light khaki",
    "b19cd9" -> "Light pastel purple",
    "ffb6c1" -> "Light pink",
    "ffa07a" -> "Light salmon",
    "ff9999" -> "Light salmon pink",
    "20b2aa" -> "Light sea green",
    "87cefa" -> "Light sky blue",
    "778899" -> "Light slate gray",
    "b38b6d" -> "Light taupe",
    "ffffed" -> "Light yellow",
    "c8a2c8" -> "Lilac",
    "bfff00" -> "Lime",
    "32cd32" -> "Lime green",
    "195905" -> "Lincoln green",
    "faf0e6" -> "Linen",
    "c19a6b" -> "Lion",
    "534b4f" -> "Liver",
    "e62020" -> "Lust",
    "18453b" -> "MSU Green",
    "ffbd88" -> "Macaroni and Cheese",
    "ff00ff" -> "Magenta",
    "aaf0d1" -> "Magic mint",
    "f8f4ff" -> "Magnolia",
    "c04000" -> "Mahogany",
    "fbec5d" -> "Maize",
    "6050dc" -> "Majorelle Blue",
    "0bda51" -> "Malachite",
    "979aaa" -> "Manatee",
    "ff8243" -> "Mango Tango",
    "74c365" -> "Mantis",
    "800000" -> "Maroon",
    "e0b0ff" -> "Mauve",
    "915f6d" -> "Mauve taupe",
    "ef98aa" -> "Mauvelous",
    "73c2fb" -> "Maya blue",
    "e5b73b" -> "Meat brown",
    "0067a5" -> "Medium Persian blue",
    "66ddaa" -> "Medium aquamarine",
    "0000cd" -> "Medium blue",
    "e2062c" -> "Medium candy apple red",
    "af4035" -> "Medium carmine",
    "f3e5ab" -> "Medium champagne",
    "035096" -> "Medium electric blue",
    "1c352d" -> "Medium jungle green",
    "dda0dd" -> "Medium lavender magenta",
    "ba55d3" -> "Medium orchid",
    "9370db" -> "Medium purple",
    "bb3385" -> "Medium red violet",
    "3cb371" -> "Medium sea green",
    "7b68ee" -> "Medium slate blue",
    "c9dc87" -> "Medium spring bud",
    "00fa9a" -> "Medium spring green",
    "674c47" -> "Medium taupe",
    "0054b4" -> "Medium teal blue",
    "48d1cc" -> "Medium turquoise",
    "c71585" -> "Medium violet red",
    "fdbcb4" -> "Melon",
    "191970" -> "Midnight blue",
    "004953" -> "Midnight green",
    "ffc40c" -> "Mikado yellow",
    "3eb489" -> "Mint",
    "f5fffa" -> "Mint cream",
    "98ff98" -> "Mint green",
    "ffe4e1" -> "Misty rose",
    "faebd7" -> "Moccasin",
    "967117" -> "Mode beige",
    "73a9c2" -> "Moonstone blue",
    "ae0c00" -> "Mordant red 19",
    "addfad" -> "Moss green",
    "30ba8f" -> "Mountain Meadow",
    "997a8d" -> "Mountbatten pink",
    "c54b8c" -> "Mulberry",
    "f2f3f4" -> "Munsell",
    "ffdb58" -> "Mustard",
    "21421e" -> "Myrtle",
    "f6adc6" -> "Nadeshiko pink",
    "2a8000" -> "Napier green",
    "fada5e" -> "Naples yellow",
    "ffdead" -> "Navajo white",
    "000080" -> "Navy blue",
    "ffa343" -> "Neon Carrot",
    "fe59c2" -> "Neon fuchsia",
    "39ff14" -> "Neon green",
    "059033" -> "North Texas Green",
    "0077be" -> "Ocean Boat Blue",
    "cc7722" -> "Ochre",
    "008000" -> "Office green",
    "cfb53b" -> "Old gold",
    "fdf5e6" -> "Old lace",
    "796878" -> "Old lavender",
    "673147" -> "Old mauve",
    "c08081" -> "Old rose",
    "808000" -> "Olive",
    "6b8e23" -> "Olive Drab",
    "bab86c" -> "Olive Green",
    "9ab973" -> "Olivine",
    "0f0f0f" -> "Onyx",
    "b784a7" -> "Opera mauve",
    "ffa500" -> "Orange",
    "f8d568" -> "Orange Yellow",
    "ff9f00" -> "Orange peel",
    "ff4500" -> "Orange red",
    "da70d6" -> "Orchid",
    "654321" -> "Otter brown",
    "414a4c" -> "Outer Space",
    "ff6e4a" -> "Outrageous Orange",
    "002147" -> "Oxford Blue",
    "1ca9c9" -> "Pacific Blue",
    "006600" -> "Pakistan green",
    "273be2" -> "Palatinate blue",
    "682860" -> "Palatinate purple",
    "bcd4e6" -> "Pale aqua",
    "afeeee" -> "Pale blue",
    "987654" -> "Pale brown",
    "af4035" -> "Pale carmine",
    "9bc4e2" -> "Pale cerulean",
    "ddadaf" -> "Pale chestnut",
    "da8a67" -> "Pale copper",
    "abcdef" -> "Pale cornflower blue",
    "e6be8a" -> "Pale gold",
    "eee8aa" -> "Pale goldenrod",
    "98fb98" -> "Pale green",
    "dcd0ff" -> "Pale lavender",
    "f984e5" -> "Pale magenta",
    "fadadd" -> "Pale pink",
    "dda0dd" -> "Pale plum",
    "db7093" -> "Pale red violet",
    "96ded1" -> "Pale robin egg blue",
    "c9c0bb" -> "Pale silver",
    "ecebbd" -> "Pale spring bud",
    "bc987e" -> "Pale taupe",
    "db7093" -> "Pale violet red",
    "78184a" -> "Pansy purple",
    "ffefd5" -> "Papaya whip",
    "50c878" -> "Paris Green",
    "aec6cf" -> "Pastel blue",
    "836953" -> "Pastel brown",
    "cfcfc4" -> "Pastel gray",
    "77dd77" -> "Pastel green",
    "f49ac2" -> "Pastel magenta",
    "ffb347" -> "Pastel orange",
    "ffd1dc" -> "Pastel pink",
    "b39eb5" -> "Pastel purple",
    "ff6961" -> "Pastel red",
    "cb99c9" -> "Pastel violet",
    "fdfd96" -> "Pastel yellow",
    "800080" -> "Patriarch",
    "536878" -> "Payne grey",
    "ffe5b4" -> "Peach",
    "ffdab9" -> "Peach puff",
    "fadfad" -> "Peach yellow",
    "d1e231" -> "Pear",
    "eae0c8" -> "Pearl",
    "88d8c0" -> "Pearl Aqua",
    "e6e200" -> "Peridot",
    "ccccff" -> "Periwinkle",
    "1c39bb" -> "Persian blue",
    "32127a" -> "Persian indigo",
    "d99058" -> "Persian orange",
    "f77fbe" -> "Persian pink",
    "701c1c" -> "Persian plum",
    "cc3333" -> "Persian red",
    "fe28a2" -> "Persian rose",
    "df00ff" -> "Phlox",
    "000f89" -> "Phthalo blue",
    "123524" -> "Phthalo green",
    "fddde6" -> "Piggy pink",
    "01796f" -> "Pine green",
    "ffc0cb" -> "Pink",
    "fc74fd" -> "Pink Flamingo",
    "f78fa7" -> "Pink Sherbet",
    "e7accf" -> "Pink pearl",
    "93c572" -> "Pistachio",
    "e5e4e2" -> "Platinum",
    "dda0dd" -> "Plum",
    "ff5a36" -> "Portland Orange",
    "b0e0e6" -> "Powder blue",
    "ff8f00" -> "Princeton orange",
    "003153" -> "Prussian blue",
    "df00ff" -> "Psychedelic purple",
    "cc8899" -> "Puce",
    "ff7518" -> "Pumpkin",
    "800080" -> "Purple",
    "69359c" -> "Purple Heart",
    "9678b6" -> "Purple mountain majesty",
    "fe4eda" -> "Purple pizzazz",
    "50404d" -> "Purple taupe",
    "5d8aa8" -> "Rackley",
    "ff355e" -> "Radical Red",
    "e30b5d" -> "Raspberry",
    "915f6d" -> "Raspberry glace",
    "e25098" -> "Raspberry pink",
    "b3446c" -> "Raspberry rose",
    "d68a59" -> "Raw Sienna",
    "ff33cc" -> "Razzle dazzle rose",
    "e3256b" -> "Razzmatazz",
    "ff0000" -> "Red",
    "ff5349" -> "Red Orange",
    "a52a2a" -> "Red brown",
    "c71585" -> "Red violet",
    "004040" -> "Rich black",
    "d70040" -> "Rich carmine",
    "0892d0" -> "Rich electric blue",
    "b666d2" -> "Rich lilac",
    "b03060" -> "Rich maroon",
    "414833" -> "Rifle green",
    "ff007f" -> "Rose",
    "f9429e" -> "Rose bonbon",
    "674846" -> "Rose ebony",
    "b76e79" -> "Rose gold",
    "e32636" -> "Rose madder",
    "ff66cc" -> "Rose pink",
    "aa98a9" -> "Rose quartz",
    "905d5d" -> "Rose taupe",
    "ab4e52" -> "Rose vale",
    "65000b" -> "Rosewood",
    "d40000" -> "Rosso corsa",
    "bc8f8f" -> "Rosy brown",
    "0038a8" -> "Royal azure",
    "4169e1" -> "Royal blue",
    "ca2c92" -> "Royal fuchsia",
    "7851a9" -> "Royal purple",
    "e0115f" -> "Ruby",
    "ff0028" -> "Ruddy",
    "bb6528" -> "Ruddy brown",
    "e18e96" -> "Ruddy pink",
    "a81c07" -> "Rufous",
    "80461b" -> "Russet",
    "b7410e" -> "Rust",
    "00563f" -> "Sacramento State green",
    "8b4513" -> "Saddle brown",
    "ff6700" -> "Safety orange",
    "f4c430" -> "Saffron",
    "23297a" -> "Saint Patrick Blue",
    "ff8c69" -> "Salmon",
    "ff91a4" -> "Salmon pink",
    "c2b280" -> "Sand",
    "967117" -> "Sand dune",
    "ecd540" -> "Sandstorm",
    "f4a460" -> "Sandy brown",
    "967117" -> "Sandy taupe",
    "507d2a" -> "Sap green",
    "0f52ba" -> "Sapphire",
    "cba135" -> "Satin sheen gold",
    "ff2400" -> "Scarlet",
    "ffd800" -> "School bus yellow",
    "76ff7a" -> "Screamin Green",
    "006994" -> "Sea blue",
    "2e8b57" -> "Sea green",
    "321414" -> "Seal brown",
    "fff5ee" -> "Seashell",
    "ffba00" -> "Selective yellow",
    "704214" -> "Sepia",
    "8a795d" -> "Shadow",
    "45cea2" -> "Shamrock",
    "009e60" -> "Shamrock green",
    "fc0fc0" -> "Shocking pink",
    "882d17" -> "Sienna",
    "c0c0c0" -> "Silver",
    "cb410b" -> "Sinopia",
    "007474" -> "Skobeloff",
    "87ceeb" -> "Sky blue",
    "cf71af" -> "Sky magenta",
    "6a5acd" -> "Slate blue",
    "708090" -> "Slate gray",
    "003399" -> "Smalt",
    "933d41" -> "Smokey topaz",
    "100c08" -> "Smoky black",
    "fffafa" -> "Snow",
    "0fc0fc" -> "Spiro Disco Ball",
    "a7fc00" -> "Spring bud",
    "00ff7f" -> "Spring green",
    "4682b4" -> "Steel blue",
    "fada5e" -> "Stil de grain yellow",
    "990000" -> "Stizza",
    "008080" -> "Stormcloud",
    "e4d96f" -> "Straw",
    "ffcc33" -> "Sunglow",
    "fad6a5" -> "Sunset",
    "fd5e53" -> "Sunset Orange",
    "d2b48c" -> "Tan",
    "f94d00" -> "Tangelo",
    "f28500" -> "Tangerine",
    "ffcc00" -> "Tangerine yellow",
    "483c32" -> "Taupe",
    "8b8589" -> "Taupe gray",
    "cd5700" -> "Tawny",
    "d0f0c0" -> "Tea green",
    "f4c2c2" -> "Tea rose",
    "008080" -> "Teal",
    "367588" -> "Teal blue",
    "006d5b" -> "Teal green",
    "e2725b" -> "Terra cotta",
    "d8bfd8" -> "Thistle",
    "de6fa1" -> "Thulian pink",
    "fc89ac" -> "Tickle Me Pink",
    "0abab5" -> "Tiffany Blue",
    "e08d3c" -> "Tiger eye",
    "dbd7d2" -> "Timberwolf",
    "eee600" -> "Titanium yellow",
    "ff6347" -> "Tomato",
    "746cc0" -> "Toolbox",
    "ffc87c" -> "Topaz",
    "fd0e35" -> "Tractor red",
    "808080" -> "Trolley Grey",
    "00755e" -> "Tropical rain forest",
    "0073cf" -> "True Blue",
    "417dc1" -> "Tufts Blue",
    "deaa88" -> "Tumbleweed",
    "b57281" -> "Turkish rose",
    "30d5c8" -> "Turquoise",
    "00ffef" -> "Turquoise blue",
    "a0d6b4" -> "Turquoise green",
    "66424d" -> "Tuscan red",
    "8a496b" -> "Twilight lavender",
    "66023c" -> "Tyrian purple",
    "0033aa" -> "UA blue",
    "d9004c" -> "UA red",
    "536895" -> "UCLA Blue",
    "ffb300" -> "UCLA Gold",
    "3cd070" -> "UFO Green",
    "014421" -> "UP Forest green",
    "7b1113" -> "UP Maroon",
    "990000" -> "USC Cardinal",
    "ffcc00" -> "USC Gold",
    "8878c3" -> "Ube",
    "ff6fff" -> "Ultra pink",
    "120a8f" -> "Ultramarine",
    "4166f5" -> "Ultramarine blue",
    "635147" -> "Umber",
    "5b92e5" -> "United Nations blue",
    "b78727" -> "University of California Gold",
    "ffff66" -> "Unmellow Yellow",
    "ae2029" -> "Upsdell red",
    "e1ad21" -> "Urobilin",
    "d3003f" -> "Utah Crimson",
    "f3e5ab" -> "Vanilla",
    "c5b358" -> "Vegas gold",
    "c80815" -> "Venetian red",
    "43b3ae" -> "Verdigris",
    "e34234" -> "Vermilion",
    "a020f0" -> "Veronica",
    "ee82ee" -> "Violet",
    "324ab2" -> "Violet Blue",
    "f75394" -> "Violet Red",
    "40826d" -> "Viridian",
    "922724" -> "Vivid auburn",
    "9f1d35" -> "Vivid burgundy",
    "da1d81" -> "Vivid cerise",
    "ffa089" -> "Vivid tangerine",
    "9f00ff" -> "Vivid violet",
    "004242" -> "Warm black",
    "00ffff" -> "Waterspout",
    "645452" -> "Wenge",
    "f5deb3" -> "Wheat",
    "ffffff" -> "White",
    "f5f5f5" -> "White smoke",
    "ff43a4" -> "Wild Strawberry",
    "fc6c85" -> "Wild Watermelon",
    "a2add0" -> "Wild blue yonder",
    "722f37" -> "Wine",
    "c9a0dc" -> "Wisteria",
    "738678" -> "Xanadu",
    "0f4d92" -> "Yale Blue",
    "ffff00" -> "Yellow",
    "ffae42" -> "Yellow Orange",
    "9acd32" -> "Yellow green",
    "0014a8" -> "Zaffre",
    "2c1608" -> "Zinnwaldite brown")
}

Eh bien, depuis que je l'ai eu traîner , le voici en Objective-C:

- (NSString*)colorNameFromColor:(NSColor*)chosenColor
{
    NSColor*    calibratedColor = [chosenColor colorUsingColorSpaceName:NSCalibratedRGBColorSpace];

    CGFloat  hue;
    CGFloat  saturation;
    CGFloat  brightness;
    [calibratedColor getHue:&hue
                 saturation:&saturation
                 brightness:&brightness
                      alpha:nil];

    // I found that when the saturation was below 1% I couldn't tell
    // the color from gray
    if (saturation <= 0.01)
    {
        saturation = 0.0;
    }

    NSString*   colorName   = @"";

    // If saturation is 0.0, then this is a grayscale color
    if (saturation == 0.0)
    {
        if (brightness <= 0.2)
        {
            colorName = @"black";
        }
        else if (brightness > 0.95)
        {
            colorName = @"white";
        }
        else
        {
            colorName = @"gray";

            if (brightness < 0.33)
            {
                colorName = [@"dark " stringByAppendingString:colorName];
            }
            else if (brightness > 0.66)
            {
                colorName = [@"light " stringByAppendingString:colorName];
            }
        }
    }
    else
    {
        if ((hue <= 15.0 / 360.0) || (hue > 330.0 / 360.0))
        {
            colorName = @"red";
        }
        else if (hue < 45.0 / 360.0)
        {
            colorName = @"orange";
        }
        else if (hue < 70.0 / 360.0)
        {
            colorName = @"yellow";
        }
        else if (hue < 150.0 / 360.0)
        {
            colorName = @"green";
        }
        else if (hue < 190.0 / 360.0)
        {
            colorName = @"cyan";
        }
        else if (hue < 250.0 / 360.0)
        {
            colorName = @"blue";
        }
        else if (hue < 290.0 / 360.0)
        {
            colorName = @"purple";
        }
        else
        {
            colorName = @"magenta";
        }

        if (brightness < 0.5)
        {
            colorName = [@"dark " stringByAppendingString:colorName];
        } 
        else if (brightness > 0.8)
        {
            colorName = [@"bright " stringByAppendingString:colorName];
        }
    }

    return colorName;
}

Pharo Smalltalk

Placez ceci dans un espace de travail Pharo et imprimez-le .

| color colorNames nearestColorName |
color := Color r: 255 g: 0 b: 0 range: 255.
colorNames := Color registeredColorNames copyWithout: #transparent.
nearestColorName := colorNames detectMin: [ :each | (Color named: each) diff: color].

Les résultats sont de qualité mitigée. Toutes les couleurs plus sombres sont nommées gris , gris foncé ou gris très foncé . Probablement Colorde » diff:la méthode pourrait être mieux.

Pour une visualisation très simple, faites :

((Morph newBounds: (0@0 extent: 200@200 ) color: color) addMorph: nearestColorName asMorph) openInWorld.

Macro SAS, basée sur les noms de couleurs SAS V8 (plutôt pittoresques) décrits ici: https://v8doc.sas.com/sashtml/gref/zgscheme.htm#zrs-hues

Exemple de saisie:

%rgbname(100,100,50);

Exemple de sortie:

EDIT: mis à jour avec une version beaucoup plus compacte.

%macro rgbname(r,g,b);
data _null_;
    infile "C:\temp\colours.csv" dlm = ',' lrecl=32767 missover firstobs = 2 end = eof;
    format name description $32. rgb hls $8.;
    input name description rgb hls;
    R = input(substr(rgb,3,2),hex.);
    G = input(substr(rgb,5,2),hex.);
    B = input(substr(rgb,7,2),hex.);
    retain min_distance outdesc;
    distance = (r-&r)**2 + (g-&g)**2 + (b-&b)**2;
    min_distance = min(distance, min_distance);
    if distance = min_distance then outdesc = description;
    if eof then call symput("COLOUR_NAME", outdesc);
run;
dm log "postmessage ""You meant &COLOUR_NAME""" continue;
%mend rgbname;

Version XKCD - une arnaque flagrante de la première réponse, mais c'est une jolie petite démo du moteur d'URL de nom de fichier, qui ne nécessite pas de préparation manuelle d'un fichier CSV:

%macro rgb_xkcd_name(r,g,b);
filename xkcd URL "http://bpaste.net/raw/402634/" debug;
data _null_;
    infile xkcd dlm = ',][' lrecl=32767 missover end = eof;
    format r g b 3. name $32.;
    input r g b name;
    retain min_distance outname;
    distance = (r-&r)**2 + (g-&g)**2 + (b-&b)**2;
    min_distance = min(distance, min_distance);
    if distance = min_distance then outname = name;
    if eof then do;
        call symput("COLOUR_NAME", outname);
        put _all_;
    end;
run;
dm log "postmessage ""XKCD thinks you meant &COLOUR_NAME""" continue;
%mend rgb_xkcd_name;

AC # Solution avec Linq et KnownColors de .NET

string GetColorName(int r, int g, int b){
    return Enum.GetValues(typeof(KnownColor))
        .OfType<KnownColor>()
        .Select(x => Color.FromKnownColor(x))
        .Select(x => new {Col = x, Offset = Math.Abs(r - x.R) + Math.Abs(g - x.G) + Math.Abs(b - x.B)})
        .OrderBy(x => x.Offset)
        .Select(x => x.Col)
        .First().Name;
}

Tcl

Ceci fait référence aux couleurs X11 de rgb.txt. Sur mon Ubuntu, c'est /etc/X11/rgb.txtbien que je sache que sur certains systèmes, c'est sur /usr/lib/X11/rgb.txt. Google rgb.txtet téléchargez-le si vous n'exécutez pas X11.

#! /usr/bin/env tclsh

set f [open /etc/X11/rgb.txt]
set raw [read $f]
close $f

set COLORS {}
foreach line [split $raw \n] {
    regexp {(\d+)\s+(\d+)\s+(\d+)\s+(.+)} $line -> r g b name
    if {[info exists name] && $name != ""} {
        lappend COLORS [format %02x%02x%02x $r $g $b] $name
    }
}

proc color_distance {a b} {
    set a [scan $a %2x%2x%2x]
    set b [scan $b %2x%2x%2x]
    set dist 0

    foreach x $a y $b {
        set dist [expr {$dist + (abs($x-$y)**2)}]
    }
    return $dist
}

proc identify {given_color} {
    global COLORS
    set d 0xffffff
    set n "not found"
    set c ""

    foreach {test_color name} $COLORS {
        set dist [color_distance $given_color $test_color]
        if {$dist < $d} {
            set d $dist
            set n $name
            set c $test_color
        }
    }

    return "$n ($c)"
}

puts [identify $argv]

Passer le code de couleur comme argument de ligne de commande.

Python 2.6

Avec l'interface utilisateur:

Obfusqué (8 397 octets):

exec("import re;import base64");exec((lambda p,y:(lambda o,b,f:re.sub(o,b,f))(r"([0-9a-f]+)",lambda m:p(m,y),base64.b64decode("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")))(lambda a,b:b[int("0x"+a.group(1),16)],"0|1|2|3|4|5|6|7|colorCanvas1|colorDifs|a|instructionsLabel|colorCanvas|canvasText1|create_rectangle|green|greenEntry|return|canvasText|value|numbers|colorName|16|color|pady|padx|redEntry|blue|Application|not|valid|root|20|hex_to_rgb|range|Those|lightgoldenrodyellow|red|colorlist|colors|blueLabel|green_dif|mediumspringgreen|__init__|redLabel|rectFill|mediumaquamarine|blue_dif|Entry|mediumslateblue|mediumvioletred|mediumturquoise|convert|lightsteelblue|darkolivegreen|cornflowerblue|lightslategrey|mediumseagreen|red_dif|blanchedalmond|darkturquoise|darkslateblue|lightseagreen|darkslategray|darkgoldenrod|paleturquoise|lavenderblush|palevioletred|text|palegoldenrod|height|submit|lightskyblue|darkseagreen|greenLabel|antiquewhite|lemonchiffon|master|midnightblue|in|mediumorchid|sticky|def|green1|int|mediumpurple|self|are|Canvas|forestgreen|greenyellow|lightyellow|saddlebrown|darkmagenta|navajowhite|yellowgreen|deepskyblue|floralwhite|lightsalmon|springgreen|sandybrown|grid|lightgreen|blueviolet|darkviolet|lightcoral|Frame|mediumblue|whitesmoke|blue1|darksalmon|aquamarine|papayawhip|width|darkorchid|darkorange|ValueError|dodgerblue|powderblue|ghostwhite|chartreuse|darkgreen|darkkhaki|cadetblue|chocolate|mistyrose|Converter|indianred|000080|02x|lightcyan|steelblue|firebrick|turquoise|abs|slategray|get|palegreen|limegreen|00008b|256|rosybrown|slateblue|olivedrab|peachpuff|lawngreen|burlywood|royalblue|goldenrod|aliceblue|str|orangered|lightgray|mintcream|lightpink|geometry|seagreen|seashell|lavender|lv|fill|mainloop|darkcyan|deeppink|darkgray|moccasin|darkblue|honeydew|red1|loop|cornsilk|thistle|hotpink|Convert|dimgrey|oldlace|crimson|darkred|magenta|command|460x180|skyblue|Tkinter|708090|00ff7f|fdf5e6|e6e6fa|dda0dd|da70d6|ffefd5|ba55d3|b22222|maroon|fff0f5|fff8dc|f5fffa|d8bfd8|ff7f50|cd853f|gainsboro|87ceeb|adff2f|98fb98|f08080|f0e68c|0000cd|import|ff69b4|bisque|ff00ff|7fffd4|d3d3d3|f8f8ff|008080|6a5acd|778899|d87093|7cfc00|e9967a|9370d8|808000|afeeee|f5f5dc|20b2aa|for|c0c0c0|d2b48c|2e8b57|f5f5f5|8b4513|66cdaa|ffa500|fafad2|7b68ee|c71585|6b8e23|orange|faf0e6|4169e1|40e0d0|lightblue|ffffff|8a2be2|add8e6|7fff00|ffa07a|006400|fffff0|fff5ee|8b0000|6495ed|9400d3|ffd700|dcdcdc|00ced1|0000ff|dc143c|except|008000|f0fff0|808080|440|ffff00|f4a460|32cd32|f0ffff|87cefa|9acd32|4682b4|fffaf0|daa520|ffffe0|RGB|00ff00|fa8072|ff1493|008b8b|fffafa|b8860b|ff8c00|ffc0cb|191970|ffb6c1|00ffff|sienna|d2691e|cd5c5c|00fa9a|a52a2a|if|faebd7|800080|deb887|purple|4b0082|556b2f|bc8f8f|ffe4e1|8b008b|3cb371|ffe4b5|ee82ee|f0f8ff|a0522d|silver|violet|ffebcd|483d8b|1e90ff|ff6347|f5deb3|00bfff|eee8aa|000000|orchid|9932cc|2f4f4f|8fbc8f|ffe4c4|48d1cc|5f9ea0|salmon|800000|ff0000|fffacd|ffdab9|lstrip|ffdead|yellow|460|b0c4de|ff4500|Button|228b22|e0ffff|a9a9a9|b0e0e6|90ee90|bdb76b|696969|tomato|indigo|black|wheat|ivory|colorLabel|items|beige|Green|khaki|brown|olive|Enter|tuple|class|Color|linen|title|white|azure|coral|plum|peru|aqua|lime|from|Blue|Name|gold|snow|grey|teal|navy|pink|keys|try|i|len|app|Red|column|The|min|tan|to|Tk|row|hexValue|is|W|blueEntry|columnspan|Label".split("|")))

Non dissimulé (6 898 octets):

from Tkinter import *
colorlist = {'#7cfc00': 'lawngreen', '#808080': 'grey', '#00008b': 'darkblue', '#ffe4b5': 'moccasin', '#fffff0': 'ivory', '#9400d3': 'darkviolet', '#b8860b': 'darkgoldenrod', '#fffaf0': 'floralwhite', '#8b008b': 'darkmagenta', '#fff5ee': 'seashell', '#ff8c00': 'darkorange', '#5f9ea0': 'cadetblue', '#2f4f4f': 'darkslategray', '#afeeee': 'paleturquoise', '#add8e6': 'lightblue', '#fffafa': 'snow', '#1e90ff': 'dodgerblue', '#000000': 'black', '#8fbc8f': 'darkseagreen', '#7fffd4': 'aquamarine', '#ffe4e1': 'mistyrose', '#800000': 'maroon', '#6495ed': 'cornflowerblue', '#4169e1': 'royalblue', '#40e0d0': 'turquoise', '#ffffff': 'white', '#00ced1': 'darkturquoise', '#8b0000': 'darkred', '#ee82ee': 'violet', '#adff2f': 'greenyellow', '#b0e0e6': 'powderblue', '#7b68ee': 'mediumslateblue', '#ff00ff': 'magenta', '#4682b4': 'steelblue', '#ff6347': 'tomato', '#00ff7f': 'springgreen', '#ffefd5': 'papayawhip', '#ffd700': 'gold', '#f5fffa': 'mintcream', '#dda0dd': 'plum', '#cd5c5c': 'indianred', '#ffa07a': 'lightsalmon', '#00fa9a': 'mediumspringgreen', '#f8f8ff': 'ghostwhite', '#008000': 'green', '#faebd7': 'antiquewhite', '#f0fff0': 'honeydew', '#c0c0c0': 'silver', '#228b22': 'forestgreen', '#7fff00': 'chartreuse', '#fafad2': 'lightgoldenrodyellow', '#fff8dc': 'cornsilk', '#f4a460': 'sandybrown', '#6b8e23': 'olivedrab', '#9932cc': 'darkorchid', '#fdf5e6': 'oldlace', '#3cb371': 'mediumseagreen', '#d8bfd8': 'thistle', '#808000': 'olive', '#a9a9a9': 'darkgray', '#f5f5dc': 'beige', '#f5deb3': 'wheat', '#ffa500': 'orange', '#00ff00': 'lime', '#90ee90': 'lightgreen', '#a0522d': 'sienna', '#8b4513': 'saddlebrown', '#00ffff': 'aqua', '#4b0082': 'indigo', '#66cdaa': 'mediumaquamarine', '#b22222': 'firebrick', '#d2b48c': 'tan', '#ffebcd': 'blanchedalmond', '#0000ff': 'blue', '#da70d6': 'orchid', '#fffacd': 'lemonchiffon', '#ff7f50': 'coral', '#f5f5f5': 'whitesmoke', '#ffc0cb': 'pink', '#f0e68c': 'khaki', '#ffffe0': 'lightyellow', '#f0ffff': 'azure', '#f0f8ff': 'aliceblue', '#daa520': 'goldenrod', '#c71585': 'mediumvioletred', '#b0c4de': 'lightsteelblue', '#fa8072': 'salmon', '#708090': 'slategray', '#ff1493': 'deeppink', '#6a5acd': 'slateblue', '#2e8b57': 'seagreen', '#e9967a': 'darksalmon', '#778899': 'lightslategrey', '#ba55d3': 'mediumorchid', '#ff4500': 'orangered', '#a52a2a': 'brown', '#696969': 'dimgrey', '#191970': 'midnightblue', '#dc143c': 'crimson', '#bdb76b': 'darkkhaki', '#ffff00': 'yellow', '#d87093': 'palevioletred', '#556b2f': 'darkolivegreen', '#9370d8': 'mediumpurple', '#eee8aa': 'palegoldenrod', '#cd853f': 'peru', '#faf0e6': 'linen', '#bc8f8f': 'rosybrown', '#d2691e': 'chocolate', '#008080': 'teal', '#98fb98': 'palegreen', '#ff69b4': 'hotpink', '#e0ffff': 'lightcyan', '#87cefa': 'lightskyblue', '#ffdead': 'navajowhite', '#483d8b': 'darkslateblue', '#32cd32': 'limegreen', '#e6e6fa': 'lavender', '#800080': 'purple', '#d3d3d3': 'lightgray', '#006400': 'darkgreen', '#0000cd': 'mediumblue', '#00bfff': 'deepskyblue', '#ffe4c4': 'bisque', '#48d1cc': 'mediumturquoise', '#008b8b': 'darkcyan', '#9acd32': 'yellowgreen', '#f08080': 'lightcoral', '#ff0000': 'red', '#deb887': 'burlywood', '#ffb6c1': 'lightpink', '#20b2aa': 'lightseagreen', '#87ceeb': 'skyblue', '#fff0f5': 'lavenderblush', '#8a2be2': 'blueviolet', '#000080': 'navy', '#dcdcdc': 'gainsboro', '#ffdab9': 'peachpuff'}

def hex_to_rgb(value):
    value = value.lstrip('#')
    lv = len(value)
    return tuple(int(value[i:i+lv/3], 16) for i in range(0, lv, lv/3))

class Application(Frame):

    def __init__(self, master):
        Frame.__init__(self, master)
        self.grid()
        self.loop()

    def loop(self):
        self.instructionsLabel = Label(self, text = "Enter in a RGB value.")
        self.instructionsLabel.grid(row = 1, column = 0, columnspan = 3)

        self.redLabel = Label(self, text = "Red")
        self.redLabel.grid(row = 2, column = 0, padx = 5, pady = 5)
        self.redEntry = Entry(self)
        self.redEntry.grid(row = 3, column = 0, padx = 5, pady = 5)

        self.greenLabel = Label(self, text = "Green")
        self.greenLabel.grid(row = 2, column = 1, padx = 5, pady = 5)
        self.greenEntry = Entry(self)
        self.greenEntry.grid(row = 3, column = 1, padx = 5, pady = 5)

        self.blueLabel = Label(self, text = "Blue")
        self.blueLabel.grid(row = 2, column = 2, padx = 5, pady = 5)
        self.blueEntry = Entry(self)
        self.blueEntry.grid(row = 3, column = 2, padx = 5, pady = 5)

        self.submit = Button(self, text = "Convert", command = self.convert)
        self.submit.grid(row = 4, column = 0, columnspan = 3)

        self.colorLabel = Label(self)
        self.colorLabel.grid(row = 5, column = 0, columnspan = 3)

        self.colorCanvas = Canvas(self, width = 460, height = 20)
        self.colorCanvas.grid(row = 6, column = 0, columnspan = 3)

        self.canvasText = Label(self)
        self.canvasText.grid(row = 6, column = 0, sticky = W)

        self.colorCanvas1 = Canvas(self, width = 460, height = 20)
        self.colorCanvas1.grid(row = 7, column = 0, columnspan = 3)

        self.canvasText1 = Label(self)
        self.canvasText1.grid(row = 7, column = 0, sticky = W)

    def convert(self):
        try:
            red = int(self.redEntry.get())
            green = int(self.greenEntry.get())
            blue = int(self.blueEntry.get())
        except ValueError:
            self.colorLabel["text"] = "Those are not valid numbers."
            return

        if red not in range(256):
            self.colorLabel["text"] = "Those are not valid numbers."
            return
        if green not in range(256):
            self.colorLabel["text"] = "Those are not valid numbers."
            return
        if blue not in range(256):
            self.colorLabel["text"] = "Those are not valid numbers."
            return

        colorDifs = {}
        colors = {}
        for hexValue, colorName in colorlist.items():
            colors[colorName] = hexValue
            red1, green1, blue1 = hex_to_rgb(hexValue)
            red_dif = abs(red1 - red)
            green_dif = abs(green1 - green)
            blue_dif = abs(blue1 - blue)
            colorDifs[red_dif + green_dif + blue_dif] = colorName
        color = colorDifs[min(colorDifs.keys())];

        hexValue = colors[color]

        rectFill = '#%02x%02x%02x' % (red, green, blue)

        self.colorLabel["text"] = "The color is " +  color
        self.canvasText["text"] = "(" + str(red) + ", " + str(green) + ", " + str(blue) + ")"
        self.canvasText1["text"] = color
        self.colorCanvas.create_rectangle(20, 0, 440, 20, fill = rectFill)
        self.colorCanvas1.create_rectangle(20, 0, 440, 20, fill = hexValue)

root = Tk()
root.title("RGB to Color Name Converter")
root.geometry("460x180")
app = Application(root)

root.mainloop()

Sans interface utilisateur:

Obfusqué (6 543 octets):

exec("import re;import base64");exec((lambda p,y:(lambda o,b,f:re.sub(o,b,f))(r"([0-9a-f]+)",lambda m:p(m,y),base64.b64decode("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")))(lambda a,b:b[int("0x"+a.group(1),16)],"000000|1|2|3|colorName|blue|rgbValue|value|again|ValueError|red|try|print|colors|int|range|hex_to_rgb|while|lightgoldenrodyellow|colorlist|except|green_dif|16|blue_dif|mediumaquamarine|True|hexValue|color|mediumvioletred|mediumslateblue|break|mediumturquoise|red_dif|cornflowerblue|darkolivegreen|mediumseagreen|lightslategrey|lightsteelblue|blanchedalmond|palevioletred|lavenderblush|darkgoldenrod|paleturquoise|lightseagreen|darkslategray|darkslateblue|darkturquoise|palegoldenrod|midnightblue|mediumpurple|return|else|antiquewhite|lightskyblue|darkseagreen|mediumorchid|lemonchiffon|forestgreen|navajowhite|greenyellow|lightyellow|floralwhite|yellowgreen|lightsalmon|saddlebrown|darkmagenta|deepskyblue|springgreen|lightcoral|sandybrown|lightgreen|darkorange|aquamarine|dodgerblue|darksalmon|powderblue|blueviolet|in|mediumblue|n|papayawhip|whitesmoke|ghostwhite|darkorchid|chartreuse|darkviolet|darkgreen|lawngreen|steelblue|olivedrab|limegreen|royalblue|darkkhaki|cadetblue|mintcream|gainsboro|rosybrown|slateblue|not|chocolate|firebrick|mistyrose|goldenrod|turquoise|aliceblue|abs|burlywood|slategray|indianred|orangered|256|lightgray|lightblue|peachpuff|palegreen|lightcyan|lightpink|moccasin|honeydew|seashell|lavender|darkblue|seagreen|lv|deeppink|continue|cornsilk|darkgray|000080|darkred|thistle|hotpink|magenta|dimgrey|oldlace|skyblue|crimson|483d8b|darkcyan|00008b|1e90ff|ff6347|eee8aa|c0c0c0|fffaf0|4682b4|d2b48c|dda0dd|ff4500|00ff7f|da70d6|ffffe0|f5f5f5|daa520|ffefd5|008b8b|66cdaa|fffafa|ffa500|b22222|e9967a|raw_input|orchid|b8860b|f08080|maroon|Please|fff0f5|fafad2|7b68ee|e6e6fa|9932cc|fff8dc|c71585|ffc0cb|e0ffff|191970|2f4f4f|8fbc8f|6b8e23|orange|fdf5e6|f5fffa|ffb6c1|00ffff|faf0e6|fa8072|4169e1|sienna|d2691e|d8bfd8|cd5c5c|ff7f50|708090|48d1cc|00fa9a|a52a2a|ffe4c4|9400d3|ffffff|f0f8ff|ba55d3|cd853f|8b4513|add8e6|0000cd|7fff00|faebd7|9acd32|87ceeb|rgb|ffd700|deb887|adff2f|98fb98|purple|fffff0|2e8b57|fff5ee|salmon|800000|f5deb3|8b0000|a0522d|fffacd|ff1493|6495ed|ffdab9|5f9ea0|if|dcdcdc|f0e68c|556b2f|lstrip|bc8f8f|a9a9a9|778899|006400|ffdead|yellow|ffe4e1|for|bisque|8b008b|b0c4de|ff00ff|00ced1|00ff00|3cb371|ffa07a|8a2be2|7fffd4|ffe4b5|228b22|bdb76b|0000ff|d3d3d3|ee82ee|ff8c00|f8f8ff|dc143c|ff69b4|4b0082|800080|008080|b0e0e6|6a5acd|ff0000|87cefa|d87093|90ee90|7cfc00|008000|9370d8|00bfff|808000|20b2aa|afeeee|f0fff0|696969|808080|silver|tomato|ffff00|violet|f4a460|indigo|ffebcd|32cd32|def|f5f5dc|f0ffff|40e0d0|khaki|ivory|linen|input|black|white|beige|ENTER|brown|olive|Press|GREEN|azure|items|wheat|tuple|coral|aqua|lime|grey|teal|plum|gold|peru|keys|snow|navy|pink|BLUE|RGB|The|the|min|i|RED|tan|len|is|INVALID|0|to|mediumspringgreen|green|nPlease".split("|")))

Non dissimulé (5 050 octets):

colorlist = {'#7cfc00': 'lawngreen', '#808080': 'grey', '#00008b': 'darkblue', '#ffe4b5': 'moccasin', '#fffff0': 'ivory', '#9400d3': 'darkviolet', '#b8860b': 'darkgoldenrod', '#fffaf0': 'floralwhite', '#8b008b': 'darkmagenta', '#fff5ee': 'seashell', '#ff8c00': 'darkorange', '#5f9ea0': 'cadetblue', '#2f4f4f': 'darkslategray', '#afeeee': 'paleturquoise', '#add8e6': 'lightblue', '#fffafa': 'snow', '#1e90ff': 'dodgerblue', '#000000': 'black', '#8fbc8f': 'darkseagreen', '#7fffd4': 'aquamarine', '#ffe4e1': 'mistyrose', '#800000': 'maroon', '#6495ed': 'cornflowerblue', '#4169e1': 'royalblue', '#40e0d0': 'turquoise', '#ffffff': 'white', '#00ced1': 'darkturquoise', '#8b0000': 'darkred', '#ee82ee': 'violet', '#adff2f': 'greenyellow', '#b0e0e6': 'powderblue', '#7b68ee': 'mediumslateblue', '#ff00ff': 'magenta', '#4682b4': 'steelblue', '#ff6347': 'tomato', '#00ff7f': 'springgreen', '#ffefd5': 'papayawhip', '#ffd700': 'gold', '#f5fffa': 'mintcream', '#dda0dd': 'plum', '#cd5c5c': 'indianred', '#ffa07a': 'lightsalmon', '#00fa9a': 'mediumspringgreen', '#f8f8ff': 'ghostwhite', '#008000': 'green', '#faebd7': 'antiquewhite', '#f0fff0': 'honeydew', '#c0c0c0': 'silver', '#228b22': 'forestgreen', '#7fff00': 'chartreuse', '#fafad2': 'lightgoldenrodyellow', '#fff8dc': 'cornsilk', '#f4a460': 'sandybrown', '#6b8e23': 'olivedrab', '#9932cc': 'darkorchid', '#fdf5e6': 'oldlace', '#3cb371': 'mediumseagreen', '#d8bfd8': 'thistle', '#808000': 'olive', '#a9a9a9': 'darkgray', '#f5f5dc': 'beige', '#f5deb3': 'wheat', '#ffa500': 'orange', '#00ff00': 'lime', '#90ee90': 'lightgreen', '#a0522d': 'sienna', '#8b4513': 'saddlebrown', '#00ffff': 'aqua', '#4b0082': 'indigo', '#66cdaa': 'mediumaquamarine', '#b22222': 'firebrick', '#d2b48c': 'tan', '#ffebcd': 'blanchedalmond', '#0000ff': 'blue', '#da70d6': 'orchid', '#fffacd': 'lemonchiffon', '#ff7f50': 'coral', '#f5f5f5': 'whitesmoke', '#ffc0cb': 'pink', '#f0e68c': 'khaki', '#ffffe0': 'lightyellow', '#f0ffff': 'azure', '#f0f8ff': 'aliceblue', '#daa520': 'goldenrod', '#c71585': 'mediumvioletred', '#b0c4de': 'lightsteelblue', '#fa8072': 'salmon', '#708090': 'slategray', '#ff1493': 'deeppink', '#6a5acd': 'slateblue', '#2e8b57': 'seagreen', '#e9967a': 'darksalmon', '#778899': 'lightslategrey', '#ba55d3': 'mediumorchid', '#ff4500': 'orangered', '#a52a2a': 'brown', '#696969': 'dimgrey', '#191970': 'midnightblue', '#dc143c': 'crimson', '#bdb76b': 'darkkhaki', '#ffff00': 'yellow', '#d87093': 'palevioletred', '#556b2f': 'darkolivegreen', '#9370d8': 'mediumpurple', '#eee8aa': 'palegoldenrod', '#cd853f': 'peru', '#faf0e6': 'linen', '#bc8f8f': 'rosybrown', '#d2691e': 'chocolate', '#008080': 'teal', '#98fb98': 'palegreen', '#ff69b4': 'hotpink', '#e0ffff': 'lightcyan', '#87cefa': 'lightskyblue', '#ffdead': 'navajowhite', '#483d8b': 'darkslateblue', '#32cd32': 'limegreen', '#e6e6fa': 'lavender', '#800080': 'purple', '#d3d3d3': 'lightgray', '#006400': 'darkgreen', '#0000cd': 'mediumblue', '#00bfff': 'deepskyblue', '#ffe4c4': 'bisque', '#48d1cc': 'mediumturquoise', '#008b8b': 'darkcyan', '#9acd32': 'yellowgreen', '#f08080': 'lightcoral', '#ff0000': 'red', '#deb887': 'burlywood', '#ffb6c1': 'lightpink', '#20b2aa': 'lightseagreen', '#87ceeb': 'skyblue', '#fff0f5': 'lavenderblush', '#8a2be2': 'blueviolet', '#000080': 'navy', '#dcdcdc': 'gainsboro', '#ffdab9': 'peachpuff'}
def hex_to_rgb(value):
    value = value.lstrip('#')
    lv = len(value)
    return tuple(int(value[i:i+lv/3], 16) for i in range(0, lv, lv/3))

def color(rgbValue):
    colors = {};
    for hexValue, colorName in colorlist.items():
        red, green, blue = hex_to_rgb(hexValue);
        red_dif = abs(red - rgbValue[0]);
        green_dif = abs(green - rgbValue[1])
        blue_dif = abs(blue - rgbValue[2])
        colors[red_dif + green_dif + blue_dif] = colorName
    return colors[min(colors.keys())];

while True:

    print "Please input the RGB value.";
    raw_input("--Press ENTER to continue--\n> ");

    red, green, blue = "", "", "";
    red = raw_input("RED\n> ");
    while True:
        try:
            if int(red) not in range(256):
                red = raw_input("--INVALID--\nPlease try again\n> ");
            else:
                break;
        except ValueError:
            red = raw_input("--INVALID--\nPlease try again\n> ");

    green = raw_input("GREEN\n> ");
    while True:
        try:
            if int(green) not in range(256):
                green = raw_input("--INVALID--\nPlease try again\n> ");
            else:
                break;
        except ValueError:
            green = raw_input("--INVALID--\nPlease try again\n> ");

    blue = raw_input("BLUE\n> ");
    while True:
        try:
            if int(blue) not in range(256):
                blue = raw_input("--INVALID--\nPlease try again\n> ");
            else:
                break;
        except ValueError:
            blue = raw_input("--INVALID--\nPlease try again\n> ");

    rgb = (int(red), int(green), int(blue));
    colorName = color(rgb);

    print "The color is", colorName;
    print
    print
    print

Javascript

https://jsfiddle.net/SuperJedi224/goxyhm7a/

Quelques exemples de résultats [au 31 juillet] (les couleurs répertoriées sont, dans l'ordre, celle qu'elle détermine comme étant la plus proche et celle qu'elle détermine comme étant la deuxième plus proche; sauf si un seul est donné, auquel cas il a été déterminé qu'il s'agit d'un correspondance exacte):

Bleu marine vif / bleu acier

Bronze / Jaune Jaune Orange

Topaze / Poire

Vert Slime / Vert Olive

Viridian / Emeraude

VB.net

Function ColorName(r AS Integer, g As Integer, b As Integer)As String
  Dim nc = Color.FromArgb(255, r, g, b)
  For Each ob In [Enum].GetValues(GetType(System.Drawing.KnownColor))
    Dim c = Color.FromKnownColor(CType(ob, System.Drawing.KnownColor))
    If (c.R = nc.R) AndAlso (c.B = nc.B) AndAlso (c.G = nc.G) Then Return c.Name
  Next
  Return nc.Name
End Function