--- /dev/null
+/* MIT license */
+var cssKeywords = require('color-name');
+
+// NOTE: conversions should only return primitive values (i.e. arrays, or
+// values that give correct `typeof` results).
+// do not use box values types (i.e. Number(), String(), etc.)
+
+var reverseKeywords = {};
+for (var key in cssKeywords) {
+ if (cssKeywords.hasOwnProperty(key)) {
+ reverseKeywords[cssKeywords[key]] = key;
+ }
+}
+
+var convert = module.exports = {
+ rgb: {channels: 3, labels: 'rgb'},
+ hsl: {channels: 3, labels: 'hsl'},
+ hsv: {channels: 3, labels: 'hsv'},
+ hwb: {channels: 3, labels: 'hwb'},
+ cmyk: {channels: 4, labels: 'cmyk'},
+ xyz: {channels: 3, labels: 'xyz'},
+ lab: {channels: 3, labels: 'lab'},
+ lch: {channels: 3, labels: 'lch'},
+ hex: {channels: 1, labels: ['hex']},
+ keyword: {channels: 1, labels: ['keyword']},
+ ansi16: {channels: 1, labels: ['ansi16']},
+ ansi256: {channels: 1, labels: ['ansi256']},
+ hcg: {channels: 3, labels: ['h', 'c', 'g']},
+ apple: {channels: 3, labels: ['r16', 'g16', 'b16']},
+ gray: {channels: 1, labels: ['gray']}
+};
+
+// hide .channels and .labels properties
+for (var model in convert) {
+ if (convert.hasOwnProperty(model)) {
+ if (!('channels' in convert[model])) {
+ throw new Error('missing channels property: ' + model);
+ }
+
+ if (!('labels' in convert[model])) {
+ throw new Error('missing channel labels property: ' + model);
+ }
+
+ if (convert[model].labels.length !== convert[model].channels) {
+ throw new Error('channel and label counts mismatch: ' + model);
+ }
+
+ var channels = convert[model].channels;
+ var labels = convert[model].labels;
+ delete convert[model].channels;
+ delete convert[model].labels;
+ Object.defineProperty(convert[model], 'channels', {value: channels});
+ Object.defineProperty(convert[model], 'labels', {value: labels});
+ }
+}
+
+convert.rgb.hsl = function (rgb) {
+ var r = rgb[0] / 255;
+ var g = rgb[1] / 255;
+ var b = rgb[2] / 255;
+ var min = Math.min(r, g, b);
+ var max = Math.max(r, g, b);
+ var delta = max - min;
+ var h;
+ var s;
+ var l;
+
+ if (max === min) {
+ h = 0;
+ } else if (r === max) {
+ h = (g - b) / delta;
+ } else if (g === max) {
+ h = 2 + (b - r) / delta;
+ } else if (b === max) {
+ h = 4 + (r - g) / delta;
+ }
+
+ h = Math.min(h * 60, 360);
+
+ if (h < 0) {
+ h += 360;
+ }
+
+ l = (min + max) / 2;
+
+ if (max === min) {
+ s = 0;
+ } else if (l <= 0.5) {
+ s = delta / (max + min);
+ } else {
+ s = delta / (2 - max - min);
+ }
+
+ return [h, s * 100, l * 100];
+};
+
+convert.rgb.hsv = function (rgb) {
+ var rdif;
+ var gdif;
+ var bdif;
+ var h;
+ var s;
+
+ var r = rgb[0] / 255;
+ var g = rgb[1] / 255;
+ var b = rgb[2] / 255;
+ var v = Math.max(r, g, b);
+ var diff = v - Math.min(r, g, b);
+ var diffc = function (c) {
+ return (v - c) / 6 / diff + 1 / 2;
+ };
+
+ if (diff === 0) {
+ h = s = 0;
+ } else {
+ s = diff / v;
+ rdif = diffc(r);
+ gdif = diffc(g);
+ bdif = diffc(b);
+
+ if (r === v) {
+ h = bdif - gdif;
+ } else if (g === v) {
+ h = (1 / 3) + rdif - bdif;
+ } else if (b === v) {
+ h = (2 / 3) + gdif - rdif;
+ }
+ if (h < 0) {
+ h += 1;
+ } else if (h > 1) {
+ h -= 1;
+ }
+ }
+
+ return [
+ h * 360,
+ s * 100,
+ v * 100
+ ];
+};
+
+convert.rgb.hwb = function (rgb) {
+ var r = rgb[0];
+ var g = rgb[1];
+ var b = rgb[2];
+ var h = convert.rgb.hsl(rgb)[0];
+ var w = 1 / 255 * Math.min(r, Math.min(g, b));
+
+ b = 1 - 1 / 255 * Math.max(r, Math.max(g, b));
+
+ return [h, w * 100, b * 100];
+};
+
+convert.rgb.cmyk = function (rgb) {
+ var r = rgb[0] / 255;
+ var g = rgb[1] / 255;
+ var b = rgb[2] / 255;
+ var c;
+ var m;
+ var y;
+ var k;
+
+ k = Math.min(1 - r, 1 - g, 1 - b);
+ c = (1 - r - k) / (1 - k) || 0;
+ m = (1 - g - k) / (1 - k) || 0;
+ y = (1 - b - k) / (1 - k) || 0;
+
+ return [c * 100, m * 100, y * 100, k * 100];
+};
+
+/**
+ * See https://en.m.wikipedia.org/wiki/Euclidean_distance#Squared_Euclidean_distance
+ * */
+function comparativeDistance(x, y) {
+ return (
+ Math.pow(x[0] - y[0], 2) +
+ Math.pow(x[1] - y[1], 2) +
+ Math.pow(x[2] - y[2], 2)
+ );
+}
+
+convert.rgb.keyword = function (rgb) {
+ var reversed = reverseKeywords[rgb];
+ if (reversed) {
+ return reversed;
+ }
+
+ var currentClosestDistance = Infinity;
+ var currentClosestKeyword;
+
+ for (var keyword in cssKeywords) {
+ if (cssKeywords.hasOwnProperty(keyword)) {
+ var value = cssKeywords[keyword];
+
+ // Compute comparative distance
+ var distance = comparativeDistance(rgb, value);
+
+ // Check if its less, if so set as closest
+ if (distance < currentClosestDistance) {
+ currentClosestDistance = distance;
+ currentClosestKeyword = keyword;
+ }
+ }
+ }
+
+ return currentClosestKeyword;
+};
+
+convert.keyword.rgb = function (keyword) {
+ return cssKeywords[keyword];
+};
+
+convert.rgb.xyz = function (rgb) {
+ var r = rgb[0] / 255;
+ var g = rgb[1] / 255;
+ var b = rgb[2] / 255;
+
+ // assume sRGB
+ r = r > 0.04045 ? Math.pow(((r + 0.055) / 1.055), 2.4) : (r / 12.92);
+ g = g > 0.04045 ? Math.pow(((g + 0.055) / 1.055), 2.4) : (g / 12.92);
+ b = b > 0.04045 ? Math.pow(((b + 0.055) / 1.055), 2.4) : (b / 12.92);
+
+ var x = (r * 0.4124) + (g * 0.3576) + (b * 0.1805);
+ var y = (r * 0.2126) + (g * 0.7152) + (b * 0.0722);
+ var z = (r * 0.0193) + (g * 0.1192) + (b * 0.9505);
+
+ return [x * 100, y * 100, z * 100];
+};
+
+convert.rgb.lab = function (rgb) {
+ var xyz = convert.rgb.xyz(rgb);
+ var x = xyz[0];
+ var y = xyz[1];
+ var z = xyz[2];
+ var l;
+ var a;
+ var b;
+
+ x /= 95.047;
+ y /= 100;
+ z /= 108.883;
+
+ x = x > 0.008856 ? Math.pow(x, 1 / 3) : (7.787 * x) + (16 / 116);
+ y = y > 0.008856 ? Math.pow(y, 1 / 3) : (7.787 * y) + (16 / 116);
+ z = z > 0.008856 ? Math.pow(z, 1 / 3) : (7.787 * z) + (16 / 116);
+
+ l = (116 * y) - 16;
+ a = 500 * (x - y);
+ b = 200 * (y - z);
+
+ return [l, a, b];
+};
+
+convert.hsl.rgb = function (hsl) {
+ var h = hsl[0] / 360;
+ var s = hsl[1] / 100;
+ var l = hsl[2] / 100;
+ var t1;
+ var t2;
+ var t3;
+ var rgb;
+ var val;
+
+ if (s === 0) {
+ val = l * 255;
+ return [val, val, val];
+ }
+
+ if (l < 0.5) {
+ t2 = l * (1 + s);
+ } else {
+ t2 = l + s - l * s;
+ }
+
+ t1 = 2 * l - t2;
+
+ rgb = [0, 0, 0];
+ for (var i = 0; i < 3; i++) {
+ t3 = h + 1 / 3 * -(i - 1);
+ if (t3 < 0) {
+ t3++;
+ }
+ if (t3 > 1) {
+ t3--;
+ }
+
+ if (6 * t3 < 1) {
+ val = t1 + (t2 - t1) * 6 * t3;
+ } else if (2 * t3 < 1) {
+ val = t2;
+ } else if (3 * t3 < 2) {
+ val = t1 + (t2 - t1) * (2 / 3 - t3) * 6;
+ } else {
+ val = t1;
+ }
+
+ rgb[i] = val * 255;
+ }
+
+ return rgb;
+};
+
+convert.hsl.hsv = function (hsl) {
+ var h = hsl[0];
+ var s = hsl[1] / 100;
+ var l = hsl[2] / 100;
+ var smin = s;
+ var lmin = Math.max(l, 0.01);
+ var sv;
+ var v;
+
+ l *= 2;
+ s *= (l <= 1) ? l : 2 - l;
+ smin *= lmin <= 1 ? lmin : 2 - lmin;
+ v = (l + s) / 2;
+ sv = l === 0 ? (2 * smin) / (lmin + smin) : (2 * s) / (l + s);
+
+ return [h, sv * 100, v * 100];
+};
+
+convert.hsv.rgb = function (hsv) {
+ var h = hsv[0] / 60;
+ var s = hsv[1] / 100;
+ var v = hsv[2] / 100;
+ var hi = Math.floor(h) % 6;
+
+ var f = h - Math.floor(h);
+ var p = 255 * v * (1 - s);
+ var q = 255 * v * (1 - (s * f));
+ var t = 255 * v * (1 - (s * (1 - f)));
+ v *= 255;
+
+ switch (hi) {
+ case 0:
+ return [v, t, p];
+ case 1:
+ return [q, v, p];
+ case 2:
+ return [p, v, t];
+ case 3:
+ return [p, q, v];
+ case 4:
+ return [t, p, v];
+ case 5:
+ return [v, p, q];
+ }
+};
+
+convert.hsv.hsl = function (hsv) {
+ var h = hsv[0];
+ var s = hsv[1] / 100;
+ var v = hsv[2] / 100;
+ var vmin = Math.max(v, 0.01);
+ var lmin;
+ var sl;
+ var l;
+
+ l = (2 - s) * v;
+ lmin = (2 - s) * vmin;
+ sl = s * vmin;
+ sl /= (lmin <= 1) ? lmin : 2 - lmin;
+ sl = sl || 0;
+ l /= 2;
+
+ return [h, sl * 100, l * 100];
+};
+
+// http://dev.w3.org/csswg/css-color/#hwb-to-rgb
+convert.hwb.rgb = function (hwb) {
+ var h = hwb[0] / 360;
+ var wh = hwb[1] / 100;
+ var bl = hwb[2] / 100;
+ var ratio = wh + bl;
+ var i;
+ var v;
+ var f;
+ var n;
+
+ // wh + bl cant be > 1
+ if (ratio > 1) {
+ wh /= ratio;
+ bl /= ratio;
+ }
+
+ i = Math.floor(6 * h);
+ v = 1 - bl;
+ f = 6 * h - i;
+
+ if ((i & 0x01) !== 0) {
+ f = 1 - f;
+ }
+
+ n = wh + f * (v - wh); // linear interpolation
+
+ var r;
+ var g;
+ var b;
+ switch (i) {
+ default:
+ case 6:
+ case 0: r = v; g = n; b = wh; break;
+ case 1: r = n; g = v; b = wh; break;
+ case 2: r = wh; g = v; b = n; break;
+ case 3: r = wh; g = n; b = v; break;
+ case 4: r = n; g = wh; b = v; break;
+ case 5: r = v; g = wh; b = n; break;
+ }
+
+ return [r * 255, g * 255, b * 255];
+};
+
+convert.cmyk.rgb = function (cmyk) {
+ var c = cmyk[0] / 100;
+ var m = cmyk[1] / 100;
+ var y = cmyk[2] / 100;
+ var k = cmyk[3] / 100;
+ var r;
+ var g;
+ var b;
+
+ r = 1 - Math.min(1, c * (1 - k) + k);
+ g = 1 - Math.min(1, m * (1 - k) + k);
+ b = 1 - Math.min(1, y * (1 - k) + k);
+
+ return [r * 255, g * 255, b * 255];
+};
+
+convert.xyz.rgb = function (xyz) {
+ var x = xyz[0] / 100;
+ var y = xyz[1] / 100;
+ var z = xyz[2] / 100;
+ var r;
+ var g;
+ var b;
+
+ r = (x * 3.2406) + (y * -1.5372) + (z * -0.4986);
+ g = (x * -0.9689) + (y * 1.8758) + (z * 0.0415);
+ b = (x * 0.0557) + (y * -0.2040) + (z * 1.0570);
+
+ // assume sRGB
+ r = r > 0.0031308
+ ? ((1.055 * Math.pow(r, 1.0 / 2.4)) - 0.055)
+ : r * 12.92;
+
+ g = g > 0.0031308
+ ? ((1.055 * Math.pow(g, 1.0 / 2.4)) - 0.055)
+ : g * 12.92;
+
+ b = b > 0.0031308
+ ? ((1.055 * Math.pow(b, 1.0 / 2.4)) - 0.055)
+ : b * 12.92;
+
+ r = Math.min(Math.max(0, r), 1);
+ g = Math.min(Math.max(0, g), 1);
+ b = Math.min(Math.max(0, b), 1);
+
+ return [r * 255, g * 255, b * 255];
+};
+
+convert.xyz.lab = function (xyz) {
+ var x = xyz[0];
+ var y = xyz[1];
+ var z = xyz[2];
+ var l;
+ var a;
+ var b;
+
+ x /= 95.047;
+ y /= 100;
+ z /= 108.883;
+
+ x = x > 0.008856 ? Math.pow(x, 1 / 3) : (7.787 * x) + (16 / 116);
+ y = y > 0.008856 ? Math.pow(y, 1 / 3) : (7.787 * y) + (16 / 116);
+ z = z > 0.008856 ? Math.pow(z, 1 / 3) : (7.787 * z) + (16 / 116);
+
+ l = (116 * y) - 16;
+ a = 500 * (x - y);
+ b = 200 * (y - z);
+
+ return [l, a, b];
+};
+
+convert.lab.xyz = function (lab) {
+ var l = lab[0];
+ var a = lab[1];
+ var b = lab[2];
+ var x;
+ var y;
+ var z;
+
+ y = (l + 16) / 116;
+ x = a / 500 + y;
+ z = y - b / 200;
+
+ var y2 = Math.pow(y, 3);
+ var x2 = Math.pow(x, 3);
+ var z2 = Math.pow(z, 3);
+ y = y2 > 0.008856 ? y2 : (y - 16 / 116) / 7.787;
+ x = x2 > 0.008856 ? x2 : (x - 16 / 116) / 7.787;
+ z = z2 > 0.008856 ? z2 : (z - 16 / 116) / 7.787;
+
+ x *= 95.047;
+ y *= 100;
+ z *= 108.883;
+
+ return [x, y, z];
+};
+
+convert.lab.lch = function (lab) {
+ var l = lab[0];
+ var a = lab[1];
+ var b = lab[2];
+ var hr;
+ var h;
+ var c;
+
+ hr = Math.atan2(b, a);
+ h = hr * 360 / 2 / Math.PI;
+
+ if (h < 0) {
+ h += 360;
+ }
+
+ c = Math.sqrt(a * a + b * b);
+
+ return [l, c, h];
+};
+
+convert.lch.lab = function (lch) {
+ var l = lch[0];
+ var c = lch[1];
+ var h = lch[2];
+ var a;
+ var b;
+ var hr;
+
+ hr = h / 360 * 2 * Math.PI;
+ a = c * Math.cos(hr);
+ b = c * Math.sin(hr);
+
+ return [l, a, b];
+};
+
+convert.rgb.ansi16 = function (args) {
+ var r = args[0];
+ var g = args[1];
+ var b = args[2];
+ var value = 1 in arguments ? arguments[1] : convert.rgb.hsv(args)[2]; // hsv -> ansi16 optimization
+
+ value = Math.round(value / 50);
+
+ if (value === 0) {
+ return 30;
+ }
+
+ var ansi = 30
+ + ((Math.round(b / 255) << 2)
+ | (Math.round(g / 255) << 1)
+ | Math.round(r / 255));
+
+ if (value === 2) {
+ ansi += 60;
+ }
+
+ return ansi;
+};
+
+convert.hsv.ansi16 = function (args) {
+ // optimization here; we already know the value and don't need to get
+ // it converted for us.
+ return convert.rgb.ansi16(convert.hsv.rgb(args), args[2]);
+};
+
+convert.rgb.ansi256 = function (args) {
+ var r = args[0];
+ var g = args[1];
+ var b = args[2];
+
+ // we use the extended greyscale palette here, with the exception of
+ // black and white. normal palette only has 4 greyscale shades.
+ if (r === g && g === b) {
+ if (r < 8) {
+ return 16;
+ }
+
+ if (r > 248) {
+ return 231;
+ }
+
+ return Math.round(((r - 8) / 247) * 24) + 232;
+ }
+
+ var ansi = 16
+ + (36 * Math.round(r / 255 * 5))
+ + (6 * Math.round(g / 255 * 5))
+ + Math.round(b / 255 * 5);
+
+ return ansi;
+};
+
+convert.ansi16.rgb = function (args) {
+ var color = args % 10;
+
+ // handle greyscale
+ if (color === 0 || color === 7) {
+ if (args > 50) {
+ color += 3.5;
+ }
+
+ color = color / 10.5 * 255;
+
+ return [color, color, color];
+ }
+
+ var mult = (~~(args > 50) + 1) * 0.5;
+ var r = ((color & 1) * mult) * 255;
+ var g = (((color >> 1) & 1) * mult) * 255;
+ var b = (((color >> 2) & 1) * mult) * 255;
+
+ return [r, g, b];
+};
+
+convert.ansi256.rgb = function (args) {
+ // handle greyscale
+ if (args >= 232) {
+ var c = (args - 232) * 10 + 8;
+ return [c, c, c];
+ }
+
+ args -= 16;
+
+ var rem;
+ var r = Math.floor(args / 36) / 5 * 255;
+ var g = Math.floor((rem = args % 36) / 6) / 5 * 255;
+ var b = (rem % 6) / 5 * 255;
+
+ return [r, g, b];
+};
+
+convert.rgb.hex = function (args) {
+ var integer = ((Math.round(args[0]) & 0xFF) << 16)
+ + ((Math.round(args[1]) & 0xFF) << 8)
+ + (Math.round(args[2]) & 0xFF);
+
+ var string = integer.toString(16).toUpperCase();
+ return '000000'.substring(string.length) + string;
+};
+
+convert.hex.rgb = function (args) {
+ var match = args.toString(16).match(/[a-f0-9]{6}|[a-f0-9]{3}/i);
+ if (!match) {
+ return [0, 0, 0];
+ }
+
+ var colorString = match[0];
+
+ if (match[0].length === 3) {
+ colorString = colorString.split('').map(function (char) {
+ return char + char;
+ }).join('');
+ }
+
+ var integer = parseInt(colorString, 16);
+ var r = (integer >> 16) & 0xFF;
+ var g = (integer >> 8) & 0xFF;
+ var b = integer & 0xFF;
+
+ return [r, g, b];
+};
+
+convert.rgb.hcg = function (rgb) {
+ var r = rgb[0] / 255;
+ var g = rgb[1] / 255;
+ var b = rgb[2] / 255;
+ var max = Math.max(Math.max(r, g), b);
+ var min = Math.min(Math.min(r, g), b);
+ var chroma = (max - min);
+ var grayscale;
+ var hue;
+
+ if (chroma < 1) {
+ grayscale = min / (1 - chroma);
+ } else {
+ grayscale = 0;
+ }
+
+ if (chroma <= 0) {
+ hue = 0;
+ } else
+ if (max === r) {
+ hue = ((g - b) / chroma) % 6;
+ } else
+ if (max === g) {
+ hue = 2 + (b - r) / chroma;
+ } else {
+ hue = 4 + (r - g) / chroma + 4;
+ }
+
+ hue /= 6;
+ hue %= 1;
+
+ return [hue * 360, chroma * 100, grayscale * 100];
+};
+
+convert.hsl.hcg = function (hsl) {
+ var s = hsl[1] / 100;
+ var l = hsl[2] / 100;
+ var c = 1;
+ var f = 0;
+
+ if (l < 0.5) {
+ c = 2.0 * s * l;
+ } else {
+ c = 2.0 * s * (1.0 - l);
+ }
+
+ if (c < 1.0) {
+ f = (l - 0.5 * c) / (1.0 - c);
+ }
+
+ return [hsl[0], c * 100, f * 100];
+};
+
+convert.hsv.hcg = function (hsv) {
+ var s = hsv[1] / 100;
+ var v = hsv[2] / 100;
+
+ var c = s * v;
+ var f = 0;
+
+ if (c < 1.0) {
+ f = (v - c) / (1 - c);
+ }
+
+ return [hsv[0], c * 100, f * 100];
+};
+
+convert.hcg.rgb = function (hcg) {
+ var h = hcg[0] / 360;
+ var c = hcg[1] / 100;
+ var g = hcg[2] / 100;
+
+ if (c === 0.0) {
+ return [g * 255, g * 255, g * 255];
+ }
+
+ var pure = [0, 0, 0];
+ var hi = (h % 1) * 6;
+ var v = hi % 1;
+ var w = 1 - v;
+ var mg = 0;
+
+ switch (Math.floor(hi)) {
+ case 0:
+ pure[0] = 1; pure[1] = v; pure[2] = 0; break;
+ case 1:
+ pure[0] = w; pure[1] = 1; pure[2] = 0; break;
+ case 2:
+ pure[0] = 0; pure[1] = 1; pure[2] = v; break;
+ case 3:
+ pure[0] = 0; pure[1] = w; pure[2] = 1; break;
+ case 4:
+ pure[0] = v; pure[1] = 0; pure[2] = 1; break;
+ default:
+ pure[0] = 1; pure[1] = 0; pure[2] = w;
+ }
+
+ mg = (1.0 - c) * g;
+
+ return [
+ (c * pure[0] + mg) * 255,
+ (c * pure[1] + mg) * 255,
+ (c * pure[2] + mg) * 255
+ ];
+};
+
+convert.hcg.hsv = function (hcg) {
+ var c = hcg[1] / 100;
+ var g = hcg[2] / 100;
+
+ var v = c + g * (1.0 - c);
+ var f = 0;
+
+ if (v > 0.0) {
+ f = c / v;
+ }
+
+ return [hcg[0], f * 100, v * 100];
+};
+
+convert.hcg.hsl = function (hcg) {
+ var c = hcg[1] / 100;
+ var g = hcg[2] / 100;
+
+ var l = g * (1.0 - c) + 0.5 * c;
+ var s = 0;
+
+ if (l > 0.0 && l < 0.5) {
+ s = c / (2 * l);
+ } else
+ if (l >= 0.5 && l < 1.0) {
+ s = c / (2 * (1 - l));
+ }
+
+ return [hcg[0], s * 100, l * 100];
+};
+
+convert.hcg.hwb = function (hcg) {
+ var c = hcg[1] / 100;
+ var g = hcg[2] / 100;
+ var v = c + g * (1.0 - c);
+ return [hcg[0], (v - c) * 100, (1 - v) * 100];
+};
+
+convert.hwb.hcg = function (hwb) {
+ var w = hwb[1] / 100;
+ var b = hwb[2] / 100;
+ var v = 1 - b;
+ var c = v - w;
+ var g = 0;
+
+ if (c < 1) {
+ g = (v - c) / (1 - c);
+ }
+
+ return [hwb[0], c * 100, g * 100];
+};
+
+convert.apple.rgb = function (apple) {
+ return [(apple[0] / 65535) * 255, (apple[1] / 65535) * 255, (apple[2] / 65535) * 255];
+};
+
+convert.rgb.apple = function (rgb) {
+ return [(rgb[0] / 255) * 65535, (rgb[1] / 255) * 65535, (rgb[2] / 255) * 65535];
+};
+
+convert.gray.rgb = function (args) {
+ return [args[0] / 100 * 255, args[0] / 100 * 255, args[0] / 100 * 255];
+};
+
+convert.gray.hsl = convert.gray.hsv = function (args) {
+ return [0, 0, args[0]];
+};
+
+convert.gray.hwb = function (gray) {
+ return [0, 100, gray[0]];
+};
+
+convert.gray.cmyk = function (gray) {
+ return [0, 0, 0, gray[0]];
+};
+
+convert.gray.lab = function (gray) {
+ return [gray[0], 0, 0];
+};
+
+convert.gray.hex = function (gray) {
+ var val = Math.round(gray[0] / 100 * 255) & 0xFF;
+ var integer = (val << 16) + (val << 8) + val;
+
+ var string = integer.toString(16).toUpperCase();
+ return '000000'.substring(string.length) + string;
+};
+
+convert.rgb.gray = function (rgb) {
+ var val = (rgb[0] + rgb[1] + rgb[2]) / 3;
+ return [val / 255 * 100];
+};
projects / dotfiles / .git / blobdiff