Convertir les valeurs RVB en nom de couleur

Question

Comment puis-je convertir une couleur au format RVB en un nom de couleur?

Exemples:

• (0, 0, 255) -> "bleu"
• (255, 0, 0) -> "rouge"
• (128, 128, 128) - > "gray"

Answer 1

1. Remplir une liste de couleurs "connues".

2. Pour chaque calcul de couleur connue:

   rgbDistance = Math.abs(myColor.getRed() - colorI.getRed() + 
          Math.abs(myColor.getGreen() - colorI.getGreen()) + 
          Math.abs(myColor.getBlue() - colorI.getBlue()) 
   

3. Retour le nom de colorI pour lequel rgbDistance était le plus petit.

Answer 2

Toutes les valeurs RVB n'ont pas d'alias. Vous devrez peut-être créer un tableau contenant des tableaux de valeurs Rouge, Vert, Bleu et Alias. Ensuite, vous parcourez ce tableau en comparant les valeurs RVB.

http://en.wikipedia.org/wiki/List_of_colors

Edit:

Exemple:

//array of known aliases and rgb values 
ArrayList colorList = new ArrayList(); 
colorList.add(new String[] {"255", "0", "0", "Red"}); 
//etc... 

Color c = new Color(255, 0, 0); //test color 
String name = "Unknown"; 
for (String[] color : colorList) 
{ 
    int r = Integer.parseInt(color[0]) //red value 
    int g = Integer.parseInt(color[1]) //green value 
    int b = Integer.parseInt(color[2]) //blue value 
    String alias = color[3]; 

    if ((c.getRed() == r) && (c.getGreen() == g) && (c.getBlue() == b)) 
    { 
     name = alias; //found it 
     break; 
    } 
} 

Answer 3

Vous pouvez simplement construire une table de consultation, par exemple en utilisant les constantes de la classe de couleur elle-même:

Map<Integer, String> map = new HashMap<Integer, String>(); 
for (Field f : Color.class.getFields()) { 
    if (f.getType() == Color.class) { 
    Color c = (Color) f.get(null); 
    map.put(c.getRGB(), f.getName()); 
    } 
} 

Si vous voulez toutes les couleurs HTML ou toutes celles sous forme de Wikipedia liée par @ Evan, vous avez encore un peu de travail à faire cependant.

EDIT carte résultante:

0xff00ffff: CYAN 
0xff0000ff: BLUE 
0xffc0c0c0: LIGHT_GRAY 
0xff808080: GRAY 
0xffffff00: YELLOW 
0xffff0000: RED 
0xffffafaf: PINK 
0xff000000: BLACK 
0xff00ff00: GREEN 
0xffffc800: ORANGE 
0xff404040: DARK_GRAY 
0xffff00ff: MAGENTA 
0xffffffff: WHITE 

Answer 4

Hmm, qui est une sorte de problème amusant. Je peux penser à quelques solutions:

1. Vous pouvez faire un peu de devinettes en fonction des relations entre les valeurs RVB (par exemple, si une couleur est très dominante, vous devinez que, mais s'il y a un peu d'autre couleur, vous devinez de plus en plus la combinaison de ces deux couleurs émises, si les trois sont proches, alors devinez blanc, gris ou noir en fonction de la moyenne des trois valeurs, si deux sont élevés et l'autre est faible deviner la combinatoin des deux, etc etc.)

2. Vous pourriez opter pour une approche plus d'apprentissage où vous établissez quelques suppositions initiales (comme ci-dessus) et ensuite améliorez celles basées sur les commentaires de nous ers.

Malheureusement, ce problème est relativement subjective (bien que la question n'est pas!) Que la perception de la couleur est très variable entre la culture et même le sexe (voir Randall Munroe's "study" on it). Si vous voulez un sous-ensemble spécifique de valeurs RVB (comme celles qui reçoivent des constantes en Java ou en C#, vous pouvez les parcourir et les comparer, en retournant finalement une valeur par défaut si elle n'est pas égale à l'une d'entre elles).

[EDIT]

Ahh! Les utilisateurs de Colorblind hein? Avez-vous envisagé de créer un paramètre qui permet à l'utilisateur de spécifier les couleurs qu'il a du mal à différencier? Si vous faisiez cela, vous pourriez leur faire savoir que quelque chose est «20% plus rouge que vert» (si, par exemple, ils avaient une daltonisme rouge-vert, ce qui est le plus commun). Ce serait assez simple.Ils choisissent un pixel, et vous suivez cette pseudo-code:

if(userColorTrouble == RedGreen) 
{ 
    int redVal = colorInQuestion.GetRed(); 
    int greenVal = colorInQuestion.GetGreen(); 
    if(redVal > greenVal) 
    { 
     return "The color is " + (double)redVal/(redVal + greenVal) - .5d + "% redder than green"; 
    } 
    else 
    { 
     return "The color is " + (double)greenVal/(redVal + greenVal) - .5d + "% greener than red"; 
    } 
} 

Cela pourrait être une solution plus simple et plus utile.

Answer 5

Frist de tous les pixels convertis de RGB à HSV. Il est beaucoup plus facile de définir des plages de couleurs dans HSV que dans RVB.

/** 
* 
*@author Tomasz Drobiszewski 
*/ 
public class Color { 
    /** 
    * Human color table. 
    */ 
    public static final int [] [] colors = { 
      {-1,-10,-360,-0,-100,-10,-80}, 
      {1,0,360,0,100,0,50}, 
      {2,0,360,0,15,50,130}, 
      {3,0,360,0,15,130,210}, 
      {4,-15,15,15,100,50,255}, 
      {5,15,45,15,100,50,255}, 
      {6,45,75,15,100,50,255}, 
      {7,75,105,15,100,50,255}, 
      {8,105,135,15,100,50,255}, 
      {9,135,165,15,100,50,255}, 
      {10,165,195,15,100,50,255}, 
      {11,195,225,15,100,50,255}, 
      {12,225,255,15,100,50,255}, 
      {13,255,285,15,100,50,255}, 
      {14,285,315,15,100,50,255}, 
      {15,315,345,15,100,50,255}, 
      {16,345,375,15,100,50,255}, 
      {17,0,360,0,15,210,255} 
    }; 

    /** 
    * Color names. 
    */ 
    public static final String [] humanColors = { 
      "unrecognized", 
      "black", //black colors[1] 
      "grey", 
      "light_grey", 
      "red", 
      "orange", 
      "yellow", 
      "jasny_zielony", 
      "zielony", 
      "zielony", 
      "turkusowy", 
      "jasny_niebieski", 
      "niebieski", 
      "fioletowy", 
      "fioletowy", 
      "rozowy", 
      "czerwony", 
      "bialy", 
     }; 

    /** 
    * Convert from RGB do HSV 
    * 
    * @param r 
    * @param g 
    * @param b 
    * @param hsv 
    */ 
    public static void rgb2hsv(int r, int g, int b, int hsv[]) { 

     int min; // Min. value of RGB 
     int max; // Max. value of RGB 
     int delMax; // Delta RGB value 

     if (r > g) { 
      min = g; 
      max = r; 
     } else { 
      min = r; 
      max = g; 
     } 
     if (b > max) 
      max = b; 
     if (b < min) 
      min = b; 

     delMax = max - min; 

     float H = 0, S; 
     float V = max; 

     if (delMax == 0) { 
      H = 0; 
      S = 0; 

     } else { 
      S = delMax/(float) max; 
      if (r == max) 
       H = ((g - b)/(float) delMax) * 60; 
      else if (g == max) 
       H = (2 + (b - r)/(float) delMax) * 60; 
      else if (b == max) 
       H = (4 + (r - g)/(float) delMax) * 60; 

     } 

     hsv[0] = (int) (H); 
     hsv[1] = (int) (S * 100); 
     hsv[2] = (int) V; 
    } 

    /** 
    * Return human color index {@link Color#colors} 
    * 
    * @param r 
    * @param g 
    * @param b 
    * @return 
    */ 
    public static int [] getHumanColor(int r, int g, int b) { 
     int [] res = {0, 0, 0, 0}; 
     int[] hsv = new int[3]; 
     rgb2hsv(r, g, b, hsv); 
     for (int i = 1; i < colors.length; i++) { 
      if (hsv[0] <= colors[i][2] && hsv[0] >= colors[i][1] 
        && hsv[1] <= colors[i][4] && hsv[1] >= colors[i][3] 
        && hsv[2] <= colors[i][6] && hsv[2] >= colors[i][5]) { 
       res[3] = i; 
       res[0] = hsv[0]; 
       res[1] = hsv[1]; 
       res[2] = hsv[2]; 
       return res; 
      } 

     } 
     return res; 
    } 

} 

Answer 6

Voici ce que fait a working sample code. Il convertit une couleur rgb/hex value/awt en le nom de couleur le plus proche.

import java.awt.Color; 
import java.util.ArrayList; 

/** 
* Java Code to get a color name from rgb/hex value/awt color 
* 
* The part of looking up a color name from the rgb values is edited from 
* https://gist.github.com/nightlark/6482130#file-gistfile1-java (that has some errors) by Ryan Mast (nightlark) 
* 
* @author Xiaoxiao Li 
* 
*/ 
public class ColorUtils { 

    /** 
    * Initialize the color list that we have. 
    */ 
    private ArrayList<ColorName> initColorList() { 
     ArrayList<ColorName> colorList = new ArrayList<ColorName>(); 
     colorList.add(new ColorName("AliceBlue", 0xF0, 0xF8, 0xFF)); 
     colorList.add(new ColorName("AntiqueWhite", 0xFA, 0xEB, 0xD7)); 
     colorList.add(new ColorName("Aqua", 0x00, 0xFF, 0xFF)); 
     colorList.add(new ColorName("Aquamarine", 0x7F, 0xFF, 0xD4)); 
     colorList.add(new ColorName("Azure", 0xF0, 0xFF, 0xFF)); 
     colorList.add(new ColorName("Beige", 0xF5, 0xF5, 0xDC)); 
     colorList.add(new ColorName("Bisque", 0xFF, 0xE4, 0xC4)); 
     colorList.add(new ColorName("Black", 0x00, 0x00, 0x00)); 
     colorList.add(new ColorName("BlanchedAlmond", 0xFF, 0xEB, 0xCD)); 
     colorList.add(new ColorName("Blue", 0x00, 0x00, 0xFF)); 
     colorList.add(new ColorName("BlueViolet", 0x8A, 0x2B, 0xE2)); 
     colorList.add(new ColorName("Brown", 0xA5, 0x2A, 0x2A)); 
     colorList.add(new ColorName("BurlyWood", 0xDE, 0xB8, 0x87)); 
     colorList.add(new ColorName("CadetBlue", 0x5F, 0x9E, 0xA0)); 
     colorList.add(new ColorName("Chartreuse", 0x7F, 0xFF, 0x00)); 
     colorList.add(new ColorName("Chocolate", 0xD2, 0x69, 0x1E)); 
     colorList.add(new ColorName("Coral", 0xFF, 0x7F, 0x50)); 
     colorList.add(new ColorName("CornflowerBlue", 0x64, 0x95, 0xED)); 
     colorList.add(new ColorName("Cornsilk", 0xFF, 0xF8, 0xDC)); 
     colorList.add(new ColorName("Crimson", 0xDC, 0x14, 0x3C)); 
     colorList.add(new ColorName("Cyan", 0x00, 0xFF, 0xFF)); 
     colorList.add(new ColorName("DarkBlue", 0x00, 0x00, 0x8B)); 
     colorList.add(new ColorName("DarkCyan", 0x00, 0x8B, 0x8B)); 
     colorList.add(new ColorName("DarkGoldenRod", 0xB8, 0x86, 0x0B)); 
     colorList.add(new ColorName("DarkGray", 0xA9, 0xA9, 0xA9)); 
     colorList.add(new ColorName("DarkGreen", 0x00, 0x64, 0x00)); 
     colorList.add(new ColorName("DarkKhaki", 0xBD, 0xB7, 0x6B)); 
     colorList.add(new ColorName("DarkMagenta", 0x8B, 0x00, 0x8B)); 
     colorList.add(new ColorName("DarkOliveGreen", 0x55, 0x6B, 0x2F)); 
     colorList.add(new ColorName("DarkOrange", 0xFF, 0x8C, 0x00)); 
     colorList.add(new ColorName("DarkOrchid", 0x99, 0x32, 0xCC)); 
     colorList.add(new ColorName("DarkRed", 0x8B, 0x00, 0x00)); 
     colorList.add(new ColorName("DarkSalmon", 0xE9, 0x96, 0x7A)); 
     colorList.add(new ColorName("DarkSeaGreen", 0x8F, 0xBC, 0x8F)); 
     colorList.add(new ColorName("DarkSlateBlue", 0x48, 0x3D, 0x8B)); 
     colorList.add(new ColorName("DarkSlateGray", 0x2F, 0x4F, 0x4F)); 
     colorList.add(new ColorName("DarkTurquoise", 0x00, 0xCE, 0xD1)); 
     colorList.add(new ColorName("DarkViolet", 0x94, 0x00, 0xD3)); 
     colorList.add(new ColorName("DeepPink", 0xFF, 0x14, 0x93)); 
     colorList.add(new ColorName("DeepSkyBlue", 0x00, 0xBF, 0xFF)); 
     colorList.add(new ColorName("DimGray", 0x69, 0x69, 0x69)); 
     colorList.add(new ColorName("DodgerBlue", 0x1E, 0x90, 0xFF)); 
     colorList.add(new ColorName("FireBrick", 0xB2, 0x22, 0x22)); 
     colorList.add(new ColorName("FloralWhite", 0xFF, 0xFA, 0xF0)); 
     colorList.add(new ColorName("ForestGreen", 0x22, 0x8B, 0x22)); 
     colorList.add(new ColorName("Fuchsia", 0xFF, 0x00, 0xFF)); 
     colorList.add(new ColorName("Gainsboro", 0xDC, 0xDC, 0xDC)); 
     colorList.add(new ColorName("GhostWhite", 0xF8, 0xF8, 0xFF)); 
     colorList.add(new ColorName("Gold", 0xFF, 0xD7, 0x00)); 
     colorList.add(new ColorName("GoldenRod", 0xDA, 0xA5, 0x20)); 
     colorList.add(new ColorName("Gray", 0x80, 0x80, 0x80)); 
     colorList.add(new ColorName("Green", 0x00, 0x80, 0x00)); 
     colorList.add(new ColorName("GreenYellow", 0xAD, 0xFF, 0x2F)); 
     colorList.add(new ColorName("HoneyDew", 0xF0, 0xFF, 0xF0)); 
     colorList.add(new ColorName("HotPink", 0xFF, 0x69, 0xB4)); 
     colorList.add(new ColorName("IndianRed", 0xCD, 0x5C, 0x5C)); 
     colorList.add(new ColorName("Indigo", 0x4B, 0x00, 0x82)); 
     colorList.add(new ColorName("Ivory", 0xFF, 0xFF, 0xF0)); 
     colorList.add(new ColorName("Khaki", 0xF0, 0xE6, 0x8C)); 
     colorList.add(new ColorName("Lavender", 0xE6, 0xE6, 0xFA)); 
     colorList.add(new ColorName("LavenderBlush", 0xFF, 0xF0, 0xF5)); 
     colorList.add(new ColorName("LawnGreen", 0x7C, 0xFC, 0x00)); 
     colorList.add(new ColorName("LemonChiffon", 0xFF, 0xFA, 0xCD)); 
     colorList.add(new ColorName("LightBlue", 0xAD, 0xD8, 0xE6)); 
     colorList.add(new ColorName("LightCoral", 0xF0, 0x80, 0x80)); 
     colorList.add(new ColorName("LightCyan", 0xE0, 0xFF, 0xFF)); 
     colorList.add(new ColorName("LightGoldenRodYellow", 0xFA, 0xFA, 0xD2)); 
     colorList.add(new ColorName("LightGray", 0xD3, 0xD3, 0xD3)); 
     colorList.add(new ColorName("LightGreen", 0x90, 0xEE, 0x90)); 
     colorList.add(new ColorName("LightPink", 0xFF, 0xB6, 0xC1)); 
     colorList.add(new ColorName("LightSalmon", 0xFF, 0xA0, 0x7A)); 
     colorList.add(new ColorName("LightSeaGreen", 0x20, 0xB2, 0xAA)); 
     colorList.add(new ColorName("LightSkyBlue", 0x87, 0xCE, 0xFA)); 
     colorList.add(new ColorName("LightSlateGray", 0x77, 0x88, 0x99)); 
     colorList.add(new ColorName("LightSteelBlue", 0xB0, 0xC4, 0xDE)); 
     colorList.add(new ColorName("LightYellow", 0xFF, 0xFF, 0xE0)); 
     colorList.add(new ColorName("Lime", 0x00, 0xFF, 0x00)); 
     colorList.add(new ColorName("LimeGreen", 0x32, 0xCD, 0x32)); 
     colorList.add(new ColorName("Linen", 0xFA, 0xF0, 0xE6)); 
     colorList.add(new ColorName("Magenta", 0xFF, 0x00, 0xFF)); 
     colorList.add(new ColorName("Maroon", 0x80, 0x00, 0x00)); 
     colorList.add(new ColorName("MediumAquaMarine", 0x66, 0xCD, 0xAA)); 
     colorList.add(new ColorName("MediumBlue", 0x00, 0x00, 0xCD)); 
     colorList.add(new ColorName("MediumOrchid", 0xBA, 0x55, 0xD3)); 
     colorList.add(new ColorName("MediumPurple", 0x93, 0x70, 0xDB)); 
     colorList.add(new ColorName("MediumSeaGreen", 0x3C, 0xB3, 0x71)); 
     colorList.add(new ColorName("MediumSlateBlue", 0x7B, 0x68, 0xEE)); 
     colorList.add(new ColorName("MediumSpringGreen", 0x00, 0xFA, 0x9A)); 
     colorList.add(new ColorName("MediumTurquoise", 0x48, 0xD1, 0xCC)); 
     colorList.add(new ColorName("MediumVioletRed", 0xC7, 0x15, 0x85)); 
     colorList.add(new ColorName("MidnightBlue", 0x19, 0x19, 0x70)); 
     colorList.add(new ColorName("MintCream", 0xF5, 0xFF, 0xFA)); 
     colorList.add(new ColorName("MistyRose", 0xFF, 0xE4, 0xE1)); 
     colorList.add(new ColorName("Moccasin", 0xFF, 0xE4, 0xB5)); 
     colorList.add(new ColorName("NavajoWhite", 0xFF, 0xDE, 0xAD)); 
     colorList.add(new ColorName("Navy", 0x00, 0x00, 0x80)); 
     colorList.add(new ColorName("OldLace", 0xFD, 0xF5, 0xE6)); 
     colorList.add(new ColorName("Olive", 0x80, 0x80, 0x00)); 
     colorList.add(new ColorName("OliveDrab", 0x6B, 0x8E, 0x23)); 
     colorList.add(new ColorName("Orange", 0xFF, 0xA5, 0x00)); 
     colorList.add(new ColorName("OrangeRed", 0xFF, 0x45, 0x00)); 
     colorList.add(new ColorName("Orchid", 0xDA, 0x70, 0xD6)); 
     colorList.add(new ColorName("PaleGoldenRod", 0xEE, 0xE8, 0xAA)); 
     colorList.add(new ColorName("PaleGreen", 0x98, 0xFB, 0x98)); 
     colorList.add(new ColorName("PaleTurquoise", 0xAF, 0xEE, 0xEE)); 
     colorList.add(new ColorName("PaleVioletRed", 0xDB, 0x70, 0x93)); 
     colorList.add(new ColorName("PapayaWhip", 0xFF, 0xEF, 0xD5)); 
     colorList.add(new ColorName("PeachPuff", 0xFF, 0xDA, 0xB9)); 
     colorList.add(new ColorName("Peru", 0xCD, 0x85, 0x3F)); 
     colorList.add(new ColorName("Pink", 0xFF, 0xC0, 0xCB)); 
     colorList.add(new ColorName("Plum", 0xDD, 0xA0, 0xDD)); 
     colorList.add(new ColorName("PowderBlue", 0xB0, 0xE0, 0xE6)); 
     colorList.add(new ColorName("Purple", 0x80, 0x00, 0x80)); 
     colorList.add(new ColorName("Red", 0xFF, 0x00, 0x00)); 
     colorList.add(new ColorName("RosyBrown", 0xBC, 0x8F, 0x8F)); 
     colorList.add(new ColorName("RoyalBlue", 0x41, 0x69, 0xE1)); 
     colorList.add(new ColorName("SaddleBrown", 0x8B, 0x45, 0x13)); 
     colorList.add(new ColorName("Salmon", 0xFA, 0x80, 0x72)); 
     colorList.add(new ColorName("SandyBrown", 0xF4, 0xA4, 0x60)); 
     colorList.add(new ColorName("SeaGreen", 0x2E, 0x8B, 0x57)); 
     colorList.add(new ColorName("SeaShell", 0xFF, 0xF5, 0xEE)); 
     colorList.add(new ColorName("Sienna", 0xA0, 0x52, 0x2D)); 
     colorList.add(new ColorName("Silver", 0xC0, 0xC0, 0xC0)); 
     colorList.add(new ColorName("SkyBlue", 0x87, 0xCE, 0xEB)); 
     colorList.add(new ColorName("SlateBlue", 0x6A, 0x5A, 0xCD)); 
     colorList.add(new ColorName("SlateGray", 0x70, 0x80, 0x90)); 
     colorList.add(new ColorName("Snow", 0xFF, 0xFA, 0xFA)); 
     colorList.add(new ColorName("SpringGreen", 0x00, 0xFF, 0x7F)); 
     colorList.add(new ColorName("SteelBlue", 0x46, 0x82, 0xB4)); 
     colorList.add(new ColorName("Tan", 0xD2, 0xB4, 0x8C)); 
     colorList.add(new ColorName("Teal", 0x00, 0x80, 0x80)); 
     colorList.add(new ColorName("Thistle", 0xD8, 0xBF, 0xD8)); 
     colorList.add(new ColorName("Tomato", 0xFF, 0x63, 0x47)); 
     colorList.add(new ColorName("Turquoise", 0x40, 0xE0, 0xD0)); 
     colorList.add(new ColorName("Violet", 0xEE, 0x82, 0xEE)); 
     colorList.add(new ColorName("Wheat", 0xF5, 0xDE, 0xB3)); 
     colorList.add(new ColorName("White", 0xFF, 0xFF, 0xFF)); 
     colorList.add(new ColorName("WhiteSmoke", 0xF5, 0xF5, 0xF5)); 
     colorList.add(new ColorName("Yellow", 0xFF, 0xFF, 0x00)); 
     colorList.add(new ColorName("YellowGreen", 0x9A, 0xCD, 0x32)); 
     return colorList; 
    } 

    /** 
    * Get the closest color name from our list 
    * 
    * @param r 
    * @param g 
    * @param b 
    * @return 
    */ 
    public String getColorNameFromRgb(int r, int g, int b) { 
     ArrayList<ColorName> colorList = initColorList(); 
     ColorName closestMatch = null; 
     int minMSE = Integer.MAX_VALUE; 
     int mse; 
     for (ColorName c : colorList) { 
      mse = c.computeMSE(r, g, b); 
      if (mse < minMSE) { 
       minMSE = mse; 
       closestMatch = c; 
      } 
     } 

     if (closestMatch != null) { 
      return closestMatch.getName(); 
     } else { 
      return "No matched color name."; 
     } 
    } 

    /** 
    * Convert hexColor to rgb, then call getColorNameFromRgb(r, g, b) 
    * 
    * @param hexColor 
    * @return 
    */ 
    public String getColorNameFromHex(int hexColor) { 
     int r = (hexColor & 0xFF0000) >> 16; 
     int g = (hexColor & 0xFF00) >> 8; 
     int b = (hexColor & 0xFF); 
     return getColorNameFromRgb(r, g, b); 
    } 

    public int colorToHex(Color c) { 
     return Integer.decode("0x" 
       + Integer.toHexString(c.getRGB()).substring(2)); 
    } 

    public String getColorNameFromColor(Color color) { 
     return getColorNameFromRgb(color.getRed(), color.getGreen(), 
       color.getBlue()); 
    } 

    /** 
    * SubClass of ColorUtils. In order to lookup color name 
    * 
    * @author Xiaoxiao Li 
    * 
    */ 
    public class ColorName { 
     public int r, g, b; 
     public String name; 

     public ColorName(String name, int r, int g, int b) { 
      this.r = r; 
      this.g = g; 
      this.b = b; 
      this.name = name; 
     } 

     public int computeMSE(int pixR, int pixG, int pixB) { 
      return (int) (((pixR - r) * (pixR - r) + (pixG - g) * (pixG - g) + (pixB - b) 
        * (pixB - b))/3); 
     } 

     public int getR() { 
      return r; 
     } 

     public int getG() { 
      return g; 
     } 

     public int getB() { 
      return b; 
     } 

     public String getName() { 
      return name; 
     } 
    } 
} 

Answer 7

Dans mon cas, je cherchais un moyen rapide pour obtenir le nom des couleurs primaires affichable sur l'ensemble ou tous hors LED de sorte que la fonction suivante fonctionne pour moi. J'espère que c'est utile à quelqu'un.

public static String getColourName(int c) { 
    String name = "UNKNOWN"; 
    int colour = Color.BLACK; 

    if(Color.red(c) > 127) { colour |= Color.RED; } 
    if(Color.green(c) > 127) { colour |= Color.GREEN; } 
    if(Color.blue(c) > 127) { colour |= Color.BLUE; } 

    switch (colour) { 
     case Color.BLACK: 
      name = "BLACK"; 
      break; 
     case Color.BLUE: 
      name = "BLUE"; 
      break; 
     case Color.GREEN: 
      name = "GREEN"; 
      break; 
     case Color.CYAN: 
      name = "CYAN"; 
      break; 
     case Color.RED: 
      name = "RED"; 
      break; 
     case Color.MAGENTA: 
      name = "MAGENTA"; 
      break; 
     case Color.YELLOW: 
      name = "YELLOW"; 
      break; 
     case Color.WHITE: 
      name = "WHITE"; 
      break; 
    } 
    return name; 
}