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tinycolor.js
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tinycolor.js
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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.tinycolor = factory());
})(this, (function () { 'use strict';
function _typeof(obj) {
"@babel/helpers - typeof";
return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
return typeof obj;
} : function (obj) {
return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
}, _typeof(obj);
}
// https://github.com/bgrins/TinyColor
// Brian Grinstead, MIT License
var trimLeft = /^\s+/;
var trimRight = /\s+$/;
function tinycolor(color, opts) {
color = color ? color : "";
opts = opts || {};
// If input is already a tinycolor, return itself
if (color instanceof tinycolor) {
return color;
}
// If we are called as a function, call using new instead
if (!(this instanceof tinycolor)) {
return new tinycolor(color, opts);
}
var rgb = inputToRGB(color);
this._originalInput = color, this._r = rgb.r, this._g = rgb.g, this._b = rgb.b, this._a = rgb.a, this._roundA = Math.round(100 * this._a) / 100, this._format = opts.format || rgb.format;
this._gradientType = opts.gradientType;
// Don't let the range of [0,255] come back in [0,1].
// Potentially lose a little bit of precision here, but will fix issues where
// .5 gets interpreted as half of the total, instead of half of 1
// If it was supposed to be 128, this was already taken care of by `inputToRgb`
if (this._r < 1) this._r = Math.round(this._r);
if (this._g < 1) this._g = Math.round(this._g);
if (this._b < 1) this._b = Math.round(this._b);
this._ok = rgb.ok;
}
tinycolor.prototype = {
isDark: function isDark() {
return this.getBrightness() < 128;
},
isLight: function isLight() {
return !this.isDark();
},
isValid: function isValid() {
return this._ok;
},
getOriginalInput: function getOriginalInput() {
return this._originalInput;
},
getFormat: function getFormat() {
return this._format;
},
getAlpha: function getAlpha() {
return this._a;
},
getBrightness: function getBrightness() {
//http://www.w3.org/TR/AERT#color-contrast
var rgb = this.toRgb();
return (rgb.r * 299 + rgb.g * 587 + rgb.b * 114) / 1000;
},
getLuminance: function getLuminance() {
//http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
var rgb = this.toRgb();
var RsRGB, GsRGB, BsRGB, R, G, B;
RsRGB = rgb.r / 255;
GsRGB = rgb.g / 255;
BsRGB = rgb.b / 255;
if (RsRGB <= 0.03928) R = RsRGB / 12.92;else R = Math.pow((RsRGB + 0.055) / 1.055, 2.4);
if (GsRGB <= 0.03928) G = GsRGB / 12.92;else G = Math.pow((GsRGB + 0.055) / 1.055, 2.4);
if (BsRGB <= 0.03928) B = BsRGB / 12.92;else B = Math.pow((BsRGB + 0.055) / 1.055, 2.4);
return 0.2126 * R + 0.7152 * G + 0.0722 * B;
},
setAlpha: function setAlpha(value) {
this._a = boundAlpha(value);
this._roundA = Math.round(100 * this._a) / 100;
return this;
},
toHsv: function toHsv() {
var hsv = rgbToHsv(this._r, this._g, this._b);
return {
h: hsv.h * 360,
s: hsv.s,
v: hsv.v,
a: this._a
};
},
toHsvString: function toHsvString() {
var hsv = rgbToHsv(this._r, this._g, this._b);
var h = Math.round(hsv.h * 360),
s = Math.round(hsv.s * 100),
v = Math.round(hsv.v * 100);
return this._a == 1 ? "hsv(" + h + ", " + s + "%, " + v + "%)" : "hsva(" + h + ", " + s + "%, " + v + "%, " + this._roundA + ")";
},
toHsl: function toHsl() {
var hsl = rgbToHsl(this._r, this._g, this._b);
return {
h: hsl.h * 360,
s: hsl.s,
l: hsl.l,
a: this._a
};
},
toHslString: function toHslString() {
var hsl = rgbToHsl(this._r, this._g, this._b);
var h = Math.round(hsl.h * 360),
s = Math.round(hsl.s * 100),
l = Math.round(hsl.l * 100);
return this._a == 1 ? "hsl(" + h + ", " + s + "%, " + l + "%)" : "hsla(" + h + ", " + s + "%, " + l + "%, " + this._roundA + ")";
},
toHex: function toHex(allow3Char) {
return rgbToHex(this._r, this._g, this._b, allow3Char);
},
toHexString: function toHexString(allow3Char) {
return "#" + this.toHex(allow3Char);
},
toHex8: function toHex8(allow4Char) {
return rgbaToHex(this._r, this._g, this._b, this._a, allow4Char);
},
toHex8String: function toHex8String(allow4Char) {
return "#" + this.toHex8(allow4Char);
},
toRgb: function toRgb() {
return {
r: Math.round(this._r),
g: Math.round(this._g),
b: Math.round(this._b),
a: this._a
};
},
toRgbString: function toRgbString() {
return this._a == 1 ? "rgb(" + Math.round(this._r) + ", " + Math.round(this._g) + ", " + Math.round(this._b) + ")" : "rgba(" + Math.round(this._r) + ", " + Math.round(this._g) + ", " + Math.round(this._b) + ", " + this._roundA + ")";
},
toPercentageRgb: function toPercentageRgb() {
return {
r: Math.round(bound01(this._r, 255) * 100) + "%",
g: Math.round(bound01(this._g, 255) * 100) + "%",
b: Math.round(bound01(this._b, 255) * 100) + "%",
a: this._a
};
},
toPercentageRgbString: function toPercentageRgbString() {
return this._a == 1 ? "rgb(" + Math.round(bound01(this._r, 255) * 100) + "%, " + Math.round(bound01(this._g, 255) * 100) + "%, " + Math.round(bound01(this._b, 255) * 100) + "%)" : "rgba(" + Math.round(bound01(this._r, 255) * 100) + "%, " + Math.round(bound01(this._g, 255) * 100) + "%, " + Math.round(bound01(this._b, 255) * 100) + "%, " + this._roundA + ")";
},
toName: function toName() {
if (this._a === 0) {
return "transparent";
}
if (this._a < 1) {
return false;
}
return hexNames[rgbToHex(this._r, this._g, this._b, true)] || false;
},
toFilter: function toFilter(secondColor) {
var hex8String = "#" + rgbaToArgbHex(this._r, this._g, this._b, this._a);
var secondHex8String = hex8String;
var gradientType = this._gradientType ? "GradientType = 1, " : "";
if (secondColor) {
var s = tinycolor(secondColor);
secondHex8String = "#" + rgbaToArgbHex(s._r, s._g, s._b, s._a);
}
return "progid:DXImageTransform.Microsoft.gradient(" + gradientType + "startColorstr=" + hex8String + ",endColorstr=" + secondHex8String + ")";
},
toString: function toString(format) {
var formatSet = !!format;
format = format || this._format;
var formattedString = false;
var hasAlpha = this._a < 1 && this._a >= 0;
var needsAlphaFormat = !formatSet && hasAlpha && (format === "hex" || format === "hex6" || format === "hex3" || format === "hex4" || format === "hex8" || format === "name");
if (needsAlphaFormat) {
// Special case for "transparent", all other non-alpha formats
// will return rgba when there is transparency.
if (format === "name" && this._a === 0) {
return this.toName();
}
return this.toRgbString();
}
if (format === "rgb") {
formattedString = this.toRgbString();
}
if (format === "prgb") {
formattedString = this.toPercentageRgbString();
}
if (format === "hex" || format === "hex6") {
formattedString = this.toHexString();
}
if (format === "hex3") {
formattedString = this.toHexString(true);
}
if (format === "hex4") {
formattedString = this.toHex8String(true);
}
if (format === "hex8") {
formattedString = this.toHex8String();
}
if (format === "name") {
formattedString = this.toName();
}
if (format === "hsl") {
formattedString = this.toHslString();
}
if (format === "hsv") {
formattedString = this.toHsvString();
}
return formattedString || this.toHexString();
},
clone: function clone() {
return tinycolor(this.toString());
},
_applyModification: function _applyModification(fn, args) {
var color = fn.apply(null, [this].concat([].slice.call(args)));
this._r = color._r;
this._g = color._g;
this._b = color._b;
this.setAlpha(color._a);
return this;
},
lighten: function lighten() {
return this._applyModification(_lighten, arguments);
},
brighten: function brighten() {
return this._applyModification(_brighten, arguments);
},
darken: function darken() {
return this._applyModification(_darken, arguments);
},
desaturate: function desaturate() {
return this._applyModification(_desaturate, arguments);
},
saturate: function saturate() {
return this._applyModification(_saturate, arguments);
},
greyscale: function greyscale() {
return this._applyModification(_greyscale, arguments);
},
spin: function spin() {
return this._applyModification(_spin, arguments);
},
_applyCombination: function _applyCombination(fn, args) {
return fn.apply(null, [this].concat([].slice.call(args)));
},
analogous: function analogous() {
return this._applyCombination(_analogous, arguments);
},
complement: function complement() {
return this._applyCombination(_complement, arguments);
},
monochromatic: function monochromatic() {
return this._applyCombination(_monochromatic, arguments);
},
splitcomplement: function splitcomplement() {
return this._applyCombination(_splitcomplement, arguments);
},
// Disabled until https://github.com/bgrins/TinyColor/issues/254
// polyad: function (number) {
// return this._applyCombination(polyad, [number]);
// },
triad: function triad() {
return this._applyCombination(polyad, [3]);
},
tetrad: function tetrad() {
return this._applyCombination(polyad, [4]);
}
};
// If input is an object, force 1 into "1.0" to handle ratios properly
// String input requires "1.0" as input, so 1 will be treated as 1
tinycolor.fromRatio = function (color, opts) {
if (_typeof(color) == "object") {
var newColor = {};
for (var i in color) {
if (color.hasOwnProperty(i)) {
if (i === "a") {
newColor[i] = color[i];
} else {
newColor[i] = convertToPercentage(color[i]);
}
}
}
color = newColor;
}
return tinycolor(color, opts);
};
// Given a string or object, convert that input to RGB
// Possible string inputs:
//
// "red"
// "#f00" or "f00"
// "#ff0000" or "ff0000"
// "#ff000000" or "ff000000"
// "rgb 255 0 0" or "rgb (255, 0, 0)"
// "rgb 1.0 0 0" or "rgb (1, 0, 0)"
// "rgba (255, 0, 0, 1)" or "rgba 255, 0, 0, 1"
// "rgba (1.0, 0, 0, 1)" or "rgba 1.0, 0, 0, 1"
// "hsl(0, 100%, 50%)" or "hsl 0 100% 50%"
// "hsla(0, 100%, 50%, 1)" or "hsla 0 100% 50%, 1"
// "hsv(0, 100%, 100%)" or "hsv 0 100% 100%"
//
function inputToRGB(color) {
var rgb = {
r: 0,
g: 0,
b: 0
};
var a = 1;
var s = null;
var v = null;
var l = null;
var ok = false;
var format = false;
if (typeof color == "string") {
color = stringInputToObject(color);
}
if (_typeof(color) == "object") {
if (isValidCSSUnit(color.r) && isValidCSSUnit(color.g) && isValidCSSUnit(color.b)) {
rgb = rgbToRgb(color.r, color.g, color.b);
ok = true;
format = String(color.r).substr(-1) === "%" ? "prgb" : "rgb";
} else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.v)) {
s = convertToPercentage(color.s);
v = convertToPercentage(color.v);
rgb = hsvToRgb(color.h, s, v);
ok = true;
format = "hsv";
} else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.l)) {
s = convertToPercentage(color.s);
l = convertToPercentage(color.l);
rgb = hslToRgb(color.h, s, l);
ok = true;
format = "hsl";
}
if (color.hasOwnProperty("a")) {
a = color.a;
}
}
a = boundAlpha(a);
return {
ok: ok,
format: color.format || format,
r: Math.min(255, Math.max(rgb.r, 0)),
g: Math.min(255, Math.max(rgb.g, 0)),
b: Math.min(255, Math.max(rgb.b, 0)),
a: a
};
}
// Conversion Functions
// --------------------
// `rgbToHsl`, `rgbToHsv`, `hslToRgb`, `hsvToRgb` modified from:
// <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>
// `rgbToRgb`
// Handle bounds / percentage checking to conform to CSS color spec
// <http://www.w3.org/TR/css3-color/>
// *Assumes:* r, g, b in [0, 255] or [0, 1]
// *Returns:* { r, g, b } in [0, 255]
function rgbToRgb(r, g, b) {
return {
r: bound01(r, 255) * 255,
g: bound01(g, 255) * 255,
b: bound01(b, 255) * 255
};
}
// `rgbToHsl`
// Converts an RGB color value to HSL.
// *Assumes:* r, g, and b are contained in [0, 255] or [0, 1]
// *Returns:* { h, s, l } in [0,1]
function rgbToHsl(r, g, b) {
r = bound01(r, 255);
g = bound01(g, 255);
b = bound01(b, 255);
var max = Math.max(r, g, b),
min = Math.min(r, g, b);
var h,
s,
l = (max + min) / 2;
if (max == min) {
h = s = 0; // achromatic
} else {
var d = max - min;
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r:
h = (g - b) / d + (g < b ? 6 : 0);
break;
case g:
h = (b - r) / d + 2;
break;
case b:
h = (r - g) / d + 4;
break;
}
h /= 6;
}
return {
h: h,
s: s,
l: l
};
}
// `hslToRgb`
// Converts an HSL color value to RGB.
// *Assumes:* h is contained in [0, 1] or [0, 360] and s and l are contained [0, 1] or [0, 100]
// *Returns:* { r, g, b } in the set [0, 255]
function hslToRgb(h, s, l) {
var r, g, b;
h = bound01(h, 360);
s = bound01(s, 100);
l = bound01(l, 100);
function hue2rgb(p, q, t) {
if (t < 0) t += 1;
if (t > 1) t -= 1;
if (t < 1 / 6) return p + (q - p) * 6 * t;
if (t < 1 / 2) return q;
if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
return p;
}
if (s === 0) {
r = g = b = l; // achromatic
} else {
var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
var p = 2 * l - q;
r = hue2rgb(p, q, h + 1 / 3);
g = hue2rgb(p, q, h);
b = hue2rgb(p, q, h - 1 / 3);
}
return {
r: r * 255,
g: g * 255,
b: b * 255
};
}
// `rgbToHsv`
// Converts an RGB color value to HSV
// *Assumes:* r, g, and b are contained in the set [0, 255] or [0, 1]
// *Returns:* { h, s, v } in [0,1]
function rgbToHsv(r, g, b) {
r = bound01(r, 255);
g = bound01(g, 255);
b = bound01(b, 255);
var max = Math.max(r, g, b),
min = Math.min(r, g, b);
var h,
s,
v = max;
var d = max - min;
s = max === 0 ? 0 : d / max;
if (max == min) {
h = 0; // achromatic
} else {
switch (max) {
case r:
h = (g - b) / d + (g < b ? 6 : 0);
break;
case g:
h = (b - r) / d + 2;
break;
case b:
h = (r - g) / d + 4;
break;
}
h /= 6;
}
return {
h: h,
s: s,
v: v
};
}
// `hsvToRgb`
// Converts an HSV color value to RGB.
// *Assumes:* h is contained in [0, 1] or [0, 360] and s and v are contained in [0, 1] or [0, 100]
// *Returns:* { r, g, b } in the set [0, 255]
function hsvToRgb(h, s, v) {
h = bound01(h, 360) * 6;
s = bound01(s, 100);
v = bound01(v, 100);
var i = Math.floor(h),
f = h - i,
p = v * (1 - s),
q = v * (1 - f * s),
t = v * (1 - (1 - f) * s),
mod = i % 6,
r = [v, q, p, p, t, v][mod],
g = [t, v, v, q, p, p][mod],
b = [p, p, t, v, v, q][mod];
return {
r: r * 255,
g: g * 255,
b: b * 255
};
}
// `rgbToHex`
// Converts an RGB color to hex
// Assumes r, g, and b are contained in the set [0, 255]
// Returns a 3 or 6 character hex
function rgbToHex(r, g, b, allow3Char) {
var hex = [pad2(Math.round(r).toString(16)), pad2(Math.round(g).toString(16)), pad2(Math.round(b).toString(16))];
// Return a 3 character hex if possible
if (allow3Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1)) {
return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0);
}
return hex.join("");
}
// `rgbaToHex`
// Converts an RGBA color plus alpha transparency to hex
// Assumes r, g, b are contained in the set [0, 255] and
// a in [0, 1]. Returns a 4 or 8 character rgba hex
function rgbaToHex(r, g, b, a, allow4Char) {
var hex = [pad2(Math.round(r).toString(16)), pad2(Math.round(g).toString(16)), pad2(Math.round(b).toString(16)), pad2(convertDecimalToHex(a))];
// Return a 4 character hex if possible
if (allow4Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1) && hex[3].charAt(0) == hex[3].charAt(1)) {
return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0) + hex[3].charAt(0);
}
return hex.join("");
}
// `rgbaToArgbHex`
// Converts an RGBA color to an ARGB Hex8 string
// Rarely used, but required for "toFilter()"
function rgbaToArgbHex(r, g, b, a) {
var hex = [pad2(convertDecimalToHex(a)), pad2(Math.round(r).toString(16)), pad2(Math.round(g).toString(16)), pad2(Math.round(b).toString(16))];
return hex.join("");
}
// `equals`
// Can be called with any tinycolor input
tinycolor.equals = function (color1, color2) {
if (!color1 || !color2) return false;
return tinycolor(color1).toRgbString() == tinycolor(color2).toRgbString();
};
tinycolor.random = function () {
return tinycolor.fromRatio({
r: Math.random(),
g: Math.random(),
b: Math.random()
});
};
// Modification Functions
// ----------------------
// Thanks to less.js for some of the basics here
// <https://github.com/cloudhead/less.js/blob/master/lib/less/functions.js>
function _desaturate(color, amount) {
amount = amount === 0 ? 0 : amount || 10;
var hsl = tinycolor(color).toHsl();
hsl.s -= amount / 100;
hsl.s = clamp01(hsl.s);
return tinycolor(hsl);
}
function _saturate(color, amount) {
amount = amount === 0 ? 0 : amount || 10;
var hsl = tinycolor(color).toHsl();
hsl.s += amount / 100;
hsl.s = clamp01(hsl.s);
return tinycolor(hsl);
}
function _greyscale(color) {
return tinycolor(color).desaturate(100);
}
function _lighten(color, amount) {
amount = amount === 0 ? 0 : amount || 10;
var hsl = tinycolor(color).toHsl();
hsl.l += amount / 100;
hsl.l = clamp01(hsl.l);
return tinycolor(hsl);
}
function _brighten(color, amount) {
amount = amount === 0 ? 0 : amount || 10;
var rgb = tinycolor(color).toRgb();
rgb.r = Math.max(0, Math.min(255, rgb.r - Math.round(255 * -(amount / 100))));
rgb.g = Math.max(0, Math.min(255, rgb.g - Math.round(255 * -(amount / 100))));
rgb.b = Math.max(0, Math.min(255, rgb.b - Math.round(255 * -(amount / 100))));
return tinycolor(rgb);
}
function _darken(color, amount) {
amount = amount === 0 ? 0 : amount || 10;
var hsl = tinycolor(color).toHsl();
hsl.l -= amount / 100;
hsl.l = clamp01(hsl.l);
return tinycolor(hsl);
}
// Spin takes a positive or negative amount within [-360, 360] indicating the change of hue.
// Values outside of this range will be wrapped into this range.
function _spin(color, amount) {
var hsl = tinycolor(color).toHsl();
var hue = (hsl.h + amount) % 360;
hsl.h = hue < 0 ? 360 + hue : hue;
return tinycolor(hsl);
}
// Combination Functions
// ---------------------
// Thanks to jQuery xColor for some of the ideas behind these
// <https://github.com/infusion/jQuery-xcolor/blob/master/jquery.xcolor.js>
function _complement(color) {
var hsl = tinycolor(color).toHsl();
hsl.h = (hsl.h + 180) % 360;
return tinycolor(hsl);
}
function polyad(color, number) {
if (isNaN(number) || number <= 0) {
throw new Error("Argument to polyad must be a positive number");
}
var hsl = tinycolor(color).toHsl();
var result = [tinycolor(color)];
var step = 360 / number;
for (var i = 1; i < number; i++) {
result.push(tinycolor({
h: (hsl.h + i * step) % 360,
s: hsl.s,
l: hsl.l
}));
}
return result;
}
function _splitcomplement(color) {
var hsl = tinycolor(color).toHsl();
var h = hsl.h;
return [tinycolor(color), tinycolor({
h: (h + 72) % 360,
s: hsl.s,
l: hsl.l
}), tinycolor({
h: (h + 216) % 360,
s: hsl.s,
l: hsl.l
})];
}
function _analogous(color, results, slices) {
results = results || 6;
slices = slices || 30;
var hsl = tinycolor(color).toHsl();
var part = 360 / slices;
var ret = [tinycolor(color)];
for (hsl.h = (hsl.h - (part * results >> 1) + 720) % 360; --results;) {
hsl.h = (hsl.h + part) % 360;
ret.push(tinycolor(hsl));
}
return ret;
}
function _monochromatic(color, results) {
results = results || 6;
var hsv = tinycolor(color).toHsv();
var h = hsv.h,
s = hsv.s,
v = hsv.v;
var ret = [];
var modification = 1 / results;
while (results--) {
ret.push(tinycolor({
h: h,
s: s,
v: v
}));
v = (v + modification) % 1;
}
return ret;
}
// Utility Functions
// ---------------------
tinycolor.mix = function (color1, color2, amount) {
amount = amount === 0 ? 0 : amount || 50;
var rgb1 = tinycolor(color1).toRgb();
var rgb2 = tinycolor(color2).toRgb();
var p = amount / 100;
var rgba = {
r: (rgb2.r - rgb1.r) * p + rgb1.r,
g: (rgb2.g - rgb1.g) * p + rgb1.g,
b: (rgb2.b - rgb1.b) * p + rgb1.b,
a: (rgb2.a - rgb1.a) * p + rgb1.a
};
return tinycolor(rgba);
};
// Readability Functions
// ---------------------
// <http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)
// `contrast`
// Analyze the 2 colors and returns the color contrast defined by (WCAG Version 2)
tinycolor.readability = function (color1, color2) {
var c1 = tinycolor(color1);
var c2 = tinycolor(color2);
return (Math.max(c1.getLuminance(), c2.getLuminance()) + 0.05) / (Math.min(c1.getLuminance(), c2.getLuminance()) + 0.05);
};
// `isReadable`
// Ensure that foreground and background color combinations meet WCAG2 guidelines.
// The third argument is an optional Object.
// the 'level' property states 'AA' or 'AAA' - if missing or invalid, it defaults to 'AA';
// the 'size' property states 'large' or 'small' - if missing or invalid, it defaults to 'small'.
// If the entire object is absent, isReadable defaults to {level:"AA",size:"small"}.
// *Example*
// tinycolor.isReadable("#000", "#111") => false
// tinycolor.isReadable("#000", "#111",{level:"AA",size:"large"}) => false
tinycolor.isReadable = function (color1, color2, wcag2) {
var readability = tinycolor.readability(color1, color2);
var wcag2Parms, out;
out = false;
wcag2Parms = validateWCAG2Parms(wcag2);
switch (wcag2Parms.level + wcag2Parms.size) {
case "AAsmall":
case "AAAlarge":
out = readability >= 4.5;
break;
case "AAlarge":
out = readability >= 3;
break;
case "AAAsmall":
out = readability >= 7;
break;
}
return out;
};
// `mostReadable`
// Given a base color and a list of possible foreground or background
// colors for that base, returns the most readable color.
// Optionally returns Black or White if the most readable color is unreadable.
// *Example*
// tinycolor.mostReadable(tinycolor.mostReadable("#123", ["#124", "#125"],{includeFallbackColors:false}).toHexString(); // "#112255"
// tinycolor.mostReadable(tinycolor.mostReadable("#123", ["#124", "#125"],{includeFallbackColors:true}).toHexString(); // "#ffffff"
// tinycolor.mostReadable("#a8015a", ["#faf3f3"],{includeFallbackColors:true,level:"AAA",size:"large"}).toHexString(); // "#faf3f3"
// tinycolor.mostReadable("#a8015a", ["#faf3f3"],{includeFallbackColors:true,level:"AAA",size:"small"}).toHexString(); // "#ffffff"
tinycolor.mostReadable = function (baseColor, colorList, args) {
var bestColor = null;
var bestScore = 0;
var readability;
var includeFallbackColors, level, size;
args = args || {};
includeFallbackColors = args.includeFallbackColors;
level = args.level;
size = args.size;
for (var i = 0; i < colorList.length; i++) {
readability = tinycolor.readability(baseColor, colorList[i]);
if (readability > bestScore) {
bestScore = readability;
bestColor = tinycolor(colorList[i]);
}
}
if (tinycolor.isReadable(baseColor, bestColor, {
level: level,
size: size
}) || !includeFallbackColors) {
return bestColor;
} else {
args.includeFallbackColors = false;
return tinycolor.mostReadable(baseColor, ["#fff", "#000"], args);
}
};
// Big List of Colors
// ------------------
// <https://www.w3.org/TR/css-color-4/#named-colors>
var names = tinycolor.names = {
aliceblue: "f0f8ff",
antiquewhite: "faebd7",
aqua: "0ff",
aquamarine: "7fffd4",
azure: "f0ffff",
beige: "f5f5dc",
bisque: "ffe4c4",
black: "000",
blanchedalmond: "ffebcd",
blue: "00f",
blueviolet: "8a2be2",
brown: "a52a2a",
burlywood: "deb887",
burntsienna: "ea7e5d",
cadetblue: "5f9ea0",
chartreuse: "7fff00",
chocolate: "d2691e",
coral: "ff7f50",
cornflowerblue: "6495ed",
cornsilk: "fff8dc",
crimson: "dc143c",
cyan: "0ff",
darkblue: "00008b",
darkcyan: "008b8b",
darkgoldenrod: "b8860b",
darkgray: "a9a9a9",
darkgreen: "006400",
darkgrey: "a9a9a9",
darkkhaki: "bdb76b",
darkmagenta: "8b008b",
darkolivegreen: "556b2f",
darkorange: "ff8c00",
darkorchid: "9932cc",
darkred: "8b0000",
darksalmon: "e9967a",
darkseagreen: "8fbc8f",
darkslateblue: "483d8b",
darkslategray: "2f4f4f",
darkslategrey: "2f4f4f",
darkturquoise: "00ced1",
darkviolet: "9400d3",
deeppink: "ff1493",
deepskyblue: "00bfff",
dimgray: "696969",
dimgrey: "696969",
dodgerblue: "1e90ff",
firebrick: "b22222",
floralwhite: "fffaf0",
forestgreen: "228b22",
fuchsia: "f0f",
gainsboro: "dcdcdc",
ghostwhite: "f8f8ff",
gold: "ffd700",
goldenrod: "daa520",
gray: "808080",
green: "008000",
greenyellow: "adff2f",
grey: "808080",
honeydew: "f0fff0",
hotpink: "ff69b4",
indianred: "cd5c5c",
indigo: "4b0082",
ivory: "fffff0",
khaki: "f0e68c",
lavender: "e6e6fa",
lavenderblush: "fff0f5",
lawngreen: "7cfc00",
lemonchiffon: "fffacd",
lightblue: "add8e6",
lightcoral: "f08080",
lightcyan: "e0ffff",
lightgoldenrodyellow: "fafad2",
lightgray: "d3d3d3",
lightgreen: "90ee90",
lightgrey: "d3d3d3",
lightpink: "ffb6c1",
lightsalmon: "ffa07a",
lightseagreen: "20b2aa",
lightskyblue: "87cefa",
lightslategray: "789",
lightslategrey: "789",
lightsteelblue: "b0c4de",
lightyellow: "ffffe0",
lime: "0f0",
limegreen: "32cd32",
linen: "faf0e6",
magenta: "f0f",
maroon: "800000",
mediumaquamarine: "66cdaa",
mediumblue: "0000cd",
mediumorchid: "ba55d3",
mediumpurple: "9370db",
mediumseagreen: "3cb371",
mediumslateblue: "7b68ee",
mediumspringgreen: "00fa9a",
mediumturquoise: "48d1cc",
mediumvioletred: "c71585",
midnightblue: "191970",
mintcream: "f5fffa",
mistyrose: "ffe4e1",
moccasin: "ffe4b5",
navajowhite: "ffdead",
navy: "000080",
oldlace: "fdf5e6",
olive: "808000",
olivedrab: "6b8e23",
orange: "ffa500",
orangered: "ff4500",
orchid: "da70d6",
palegoldenrod: "eee8aa",
palegreen: "98fb98",
paleturquoise: "afeeee",
palevioletred: "db7093",
papayawhip: "ffefd5",
peachpuff: "ffdab9",
peru: "cd853f",
pink: "ffc0cb",
plum: "dda0dd",
powderblue: "b0e0e6",
purple: "800080",
rebeccapurple: "663399",
red: "f00",
rosybrown: "bc8f8f",
royalblue: "4169e1",
saddlebrown: "8b4513",
salmon: "fa8072",
sandybrown: "f4a460",
seagreen: "2e8b57",
seashell: "fff5ee",
sienna: "a0522d",
silver: "c0c0c0",
skyblue: "87ceeb",
slateblue: "6a5acd",
slategray: "708090",
slategrey: "708090",
snow: "fffafa",
springgreen: "00ff7f",
steelblue: "4682b4",
tan: "d2b48c",
teal: "008080",
thistle: "d8bfd8",
tomato: "ff6347",
turquoise: "40e0d0",
violet: "ee82ee",
wheat: "f5deb3",
white: "fff",
whitesmoke: "f5f5f5",
yellow: "ff0",
yellowgreen: "9acd32"
};
// Make it easy to access colors via `hexNames[hex]`
var hexNames = tinycolor.hexNames = flip(names);
// Utilities
// ---------
// `{ 'name1': 'val1' }` becomes `{ 'val1': 'name1' }`
function flip(o) {
var flipped = {};
for (var i in o) {
if (o.hasOwnProperty(i)) {
flipped[o[i]] = i;
}
}
return flipped;
}
// Return a valid alpha value [0,1] with all invalid values being set to 1
function boundAlpha(a) {
a = parseFloat(a);
if (isNaN(a) || a < 0 || a > 1) {
a = 1;
}
return a;
}
// Take input from [0, n] and return it as [0, 1]
function bound01(n, max) {
if (isOnePointZero(n)) n = "100%";
var processPercent = isPercentage(n);
n = Math.min(max, Math.max(0, parseFloat(n)));
// Automatically convert percentage into number
if (processPercent) {
n = parseInt(n * max, 10) / 100;
}
// Handle floating point rounding errors
if (Math.abs(n - max) < 0.000001) {
return 1;
}
// Convert into [0, 1] range if it isn't already
return n % max / parseFloat(max);
}
// Force a number between 0 and 1
function clamp01(val) {
return Math.min(1, Math.max(0, val));
}
// Parse a base-16 hex value into a base-10 integer
function parseIntFromHex(val) {
return parseInt(val, 16);
}
// Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1
// <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>
function isOnePointZero(n) {
return typeof n == "string" && n.indexOf(".") != -1 && parseFloat(n) === 1;
}
// Check to see if string passed in is a percentage
function isPercentage(n) {
return typeof n === "string" && n.indexOf("%") != -1;
}
// Force a hex value to have 2 characters