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# 1.0.0 - 2016-01-07
- Removed: unused speed test
- Added: Automatic routing between previously unsupported conversions
([#27](https://github.com/Qix-/color-convert/pull/27))
- Removed: `xxx2xxx()` and `xxx2xxxRaw()` functions
([#27](https://github.com/Qix-/color-convert/pull/27))
- Removed: `convert()` class
([#27](https://github.com/Qix-/color-convert/pull/27))
- Changed: all functions to lookup dictionary
([#27](https://github.com/Qix-/color-convert/pull/27))
- Changed: `ansi` to `ansi256`
([#27](https://github.com/Qix-/color-convert/pull/27))
- Fixed: argument grouping for functions requiring only one argument
([#27](https://github.com/Qix-/color-convert/pull/27))
# 0.6.0 - 2015-07-23
- Added: methods to handle
[ANSI](https://en.wikipedia.org/wiki/ANSI_escape_code#Colors) 16/256 colors:
- rgb2ansi16
- rgb2ansi
- hsl2ansi16
- hsl2ansi
- hsv2ansi16
- hsv2ansi
- hwb2ansi16
- hwb2ansi
- cmyk2ansi16
- cmyk2ansi
- keyword2ansi16
- keyword2ansi
- ansi162rgb
- ansi162hsl
- ansi162hsv
- ansi162hwb
- ansi162cmyk
- ansi162keyword
- ansi2rgb
- ansi2hsl
- ansi2hsv
- ansi2hwb
- ansi2cmyk
- ansi2keyword
([#18](https://github.com/harthur/color-convert/pull/18))
# 0.5.3 - 2015-06-02
- Fixed: hsl2hsv does not return `NaN` anymore when using `[0,0,0]`
([#15](https://github.com/harthur/color-convert/issues/15))
---
Check out commit logs for older releases

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Copyright (c) 2011-2016 Heather Arthur <fayearthur@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# color-convert
[![Build Status](https://travis-ci.org/Qix-/color-convert.svg?branch=master)](https://travis-ci.org/Qix-/color-convert)
Color-convert is a color conversion library for JavaScript and node.
It converts all ways between `rgb`, `hsl`, `hsv`, `hwb`, `cmyk`, `ansi`, `ansi16`, `hex` strings, and CSS `keyword`s (will round to closest):
```js
var convert = require('color-convert');
convert.rgb.hsl(140, 200, 100); // [96, 48, 59]
convert.keyword.rgb('blue'); // [0, 0, 255]
var rgbChannels = convert.rgb.channels; // 3
var cmykChannels = convert.cmyk.channels; // 4
var ansiChannels = convert.ansi16.channels; // 1
```
# Install
```console
$ npm install color-convert
```
# API
Simply get the property of the _from_ and _to_ conversion that you're looking for.
All functions have a rounded and unrounded variant. By default, return values are rounded. To get the unrounded (raw) results, simply tack on `.raw` to the function.
All 'from' functions have a hidden property called `.channels` that indicates the number of channels the function expects (not including alpha).
```js
var convert = require('color-convert');
// Hex to LAB
convert.hex.lab('DEADBF'); // [ 76, 21, -2 ]
convert.hex.lab.raw('DEADBF'); // [ 75.56213190997677, 20.653827952644754, -2.290532499330533 ]
// RGB to CMYK
convert.rgb.cmyk(167, 255, 4); // [ 35, 0, 98, 0 ]
convert.rgb.cmyk.raw(167, 255, 4); // [ 34.509803921568626, 0, 98.43137254901961, 0 ]
```
### Arrays
All functions that accept multiple arguments also support passing an array.
Note that this does **not** apply to functions that convert from a color that only requires one value (e.g. `keyword`, `ansi256`, `hex`, etc.)
```js
var convert = require('color-convert');
convert.rgb.hex(123, 45, 67); // '7B2D43'
convert.rgb.hex([123, 45, 67]); // '7B2D43'
```
## Routing
Conversions that don't have an _explicitly_ defined conversion (in [conversions.js](conversions.js)), but can be converted by means of sub-conversions (e.g. XYZ -> **RGB** -> CMYK), are automatically routed together. This allows just about any color model supported by `color-convert` to be converted to any other model, so long as a sub-conversion path exists. This is also true for conversions requiring more than one step in between (e.g. LCH -> **LAB** -> **XYZ** -> **RGB** -> Hex).
Keep in mind that extensive conversions _may_ result in a loss of precision, and exist only to be complete. For a list of "direct" (single-step) conversions, see [conversions.js](conversions.js).
# Contribute
If there is a new model you would like to support, or want to add a direct conversion between two existing models, please send us a pull request.
# License
Copyright &copy; 2011-2016, Heather Arthur and Josh Junon. Licensed under the [MIT License](LICENSE).

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/* 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];
};

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node_modules/color-convert/index.js generated vendored Normal file
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var conversions = require('./conversions');
var route = require('./route');
var convert = {};
var models = Object.keys(conversions);
function wrapRaw(fn) {
var wrappedFn = function (args) {
if (args === undefined || args === null) {
return args;
}
if (arguments.length > 1) {
args = Array.prototype.slice.call(arguments);
}
return fn(args);
};
// preserve .conversion property if there is one
if ('conversion' in fn) {
wrappedFn.conversion = fn.conversion;
}
return wrappedFn;
}
function wrapRounded(fn) {
var wrappedFn = function (args) {
if (args === undefined || args === null) {
return args;
}
if (arguments.length > 1) {
args = Array.prototype.slice.call(arguments);
}
var result = fn(args);
// we're assuming the result is an array here.
// see notice in conversions.js; don't use box types
// in conversion functions.
if (typeof result === 'object') {
for (var len = result.length, i = 0; i < len; i++) {
result[i] = Math.round(result[i]);
}
}
return result;
};
// preserve .conversion property if there is one
if ('conversion' in fn) {
wrappedFn.conversion = fn.conversion;
}
return wrappedFn;
}
models.forEach(function (fromModel) {
convert[fromModel] = {};
Object.defineProperty(convert[fromModel], 'channels', {value: conversions[fromModel].channels});
Object.defineProperty(convert[fromModel], 'labels', {value: conversions[fromModel].labels});
var routes = route(fromModel);
var routeModels = Object.keys(routes);
routeModels.forEach(function (toModel) {
var fn = routes[toModel];
convert[fromModel][toModel] = wrapRounded(fn);
convert[fromModel][toModel].raw = wrapRaw(fn);
});
});
module.exports = convert;

46
node_modules/color-convert/package.json generated vendored Normal file
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{
"name": "color-convert",
"description": "Plain color conversion functions",
"version": "1.9.3",
"author": "Heather Arthur <fayearthur@gmail.com>",
"license": "MIT",
"repository": "Qix-/color-convert",
"scripts": {
"pretest": "xo",
"test": "node test/basic.js"
},
"keywords": [
"color",
"colour",
"convert",
"converter",
"conversion",
"rgb",
"hsl",
"hsv",
"hwb",
"cmyk",
"ansi",
"ansi16"
],
"files": [
"index.js",
"conversions.js",
"css-keywords.js",
"route.js"
],
"xo": {
"rules": {
"default-case": 0,
"no-inline-comments": 0,
"operator-linebreak": 0
}
},
"devDependencies": {
"chalk": "1.1.1",
"xo": "0.11.2"
},
"dependencies": {
"color-name": "1.1.3"
}
}

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node_modules/color-convert/route.js generated vendored Normal file
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var conversions = require('./conversions');
/*
this function routes a model to all other models.
all functions that are routed have a property `.conversion` attached
to the returned synthetic function. This property is an array
of strings, each with the steps in between the 'from' and 'to'
color models (inclusive).
conversions that are not possible simply are not included.
*/
function buildGraph() {
var graph = {};
// https://jsperf.com/object-keys-vs-for-in-with-closure/3
var models = Object.keys(conversions);
for (var len = models.length, i = 0; i < len; i++) {
graph[models[i]] = {
// http://jsperf.com/1-vs-infinity
// micro-opt, but this is simple.
distance: -1,
parent: null
};
}
return graph;
}
// https://en.wikipedia.org/wiki/Breadth-first_search
function deriveBFS(fromModel) {
var graph = buildGraph();
var queue = [fromModel]; // unshift -> queue -> pop
graph[fromModel].distance = 0;
while (queue.length) {
var current = queue.pop();
var adjacents = Object.keys(conversions[current]);
for (var len = adjacents.length, i = 0; i < len; i++) {
var adjacent = adjacents[i];
var node = graph[adjacent];
if (node.distance === -1) {
node.distance = graph[current].distance + 1;
node.parent = current;
queue.unshift(adjacent);
}
}
}
return graph;
}
function link(from, to) {
return function (args) {
return to(from(args));
};
}
function wrapConversion(toModel, graph) {
var path = [graph[toModel].parent, toModel];
var fn = conversions[graph[toModel].parent][toModel];
var cur = graph[toModel].parent;
while (graph[cur].parent) {
path.unshift(graph[cur].parent);
fn = link(conversions[graph[cur].parent][cur], fn);
cur = graph[cur].parent;
}
fn.conversion = path;
return fn;
}
module.exports = function (fromModel) {
var graph = deriveBFS(fromModel);
var conversion = {};
var models = Object.keys(graph);
for (var len = models.length, i = 0; i < len; i++) {
var toModel = models[i];
var node = graph[toModel];
if (node.parent === null) {
// no possible conversion, or this node is the source model.
continue;
}
conversion[toModel] = wrapConversion(toModel, graph);
}
return conversion;
};