JarCastingchartjs-color
JavaScript library for color conversion and manipulation with support for CSS color strings.
var color = Color("#7743CE");
color.alpha(0.5).lighten(0.5);
console.log(color.hslString()); // "hsla(262, 59%, 81%, 0.5)"
Install
$ npm install color
Usage
var Color = require("color")
Setters
var color = Color("rgb(255, 255, 255)")
var color = Color({r: 255, g: 255, b: 255})
var color = Color().rgb(255, 255, 255)
var color = Color().rgb([255, 255, 255])
Pass any valid CSS color string into Color() or a hash of values. Also load in color values with rgb(), hsl(), hsv(), hwb(), and cmyk().
color.red(120)
Set the values for individual channels with alpha, red, green, blue, hue, saturation (hsl), saturationv (hsv), lightness, whiteness, blackness, cyan, magenta, yellow, black
Getters
color.rgb() // {r: 255, g: 255, b: 255}
Get a hash of the rgb values with rgb(), similarly for hsl(), hsv(), and cmyk()
color.rgbArray() // [255, 255, 255]
Get an array of the values with rgbArray(), hslArray(), hsvArray(), and cmykArray().
color.red() // 255
Get the value for an individual channel.
CSS Strings
color.hslString() // "hsl(320, 50%, 100%)"
Different CSS String formats for the color are on hexString, rgbString, percentString, hslString, hwbString, and keyword (undefined if it's not a keyword color). "rgba" and "hsla" are used if the current alpha value of the color isn't 1.
Luminosity
color.luminosity(); // 0.412
The WCAG luminosity of the color. 0 is black, 1 is white.
color.contrast(Color("blue")) // 12
The WCAG contrast ratio to another color, from 1 (same color) to 21 (contrast b/w white and black).
color.light(); // true
color.dark(); // false
Get whether the color is "light" or "dark", useful for deciding text color.
Manipulation
color.negate() // rgb(0, 100, 255) -> rgb(255, 155, 0)
color.lighten(0.5) // hsl(100, 50%, 50%) -> hsl(100, 50%, 75%)
color.darken(0.5) // hsl(100, 50%, 50%) -> hsl(100, 50%, 25%)
color.saturate(0.5) // hsl(100, 50%, 50%) -> hsl(100, 75%, 50%)
color.desaturate(0.5) // hsl(100, 50%, 50%) -> hsl(100, 25%, 50%)
color.greyscale() // #5CBF54 -> #969696
color.whiten(0.5) // hwb(100, 50%, 50%) -> hwb(100, 75%, 50%)
color.blacken(0.5) // hwb(100, 50%, 50%) -> hwb(100, 50%, 75%)
color.clearer(0.5) // rgba(10, 10, 10, 0.8) -> rgba(10, 10, 10, 0.4)
color.opaquer(0.5) // rgba(10, 10, 10, 0.8) -> rgba(10, 10, 10, 1.0)
color.rotate(180) // hsl(60, 20%, 20%) -> hsl(240, 20%, 20%)
color.rotate(-90) // hsl(60, 20%, 20%) -> hsl(330, 20%, 20%)
color.mix(Color("yellow")) // cyan -> rgb(128, 255, 128)
color.mix(Color("yellow"), 0.3) // cyan -> rgb(77, 255, 179)
// chaining
color.green(100).greyscale().lighten(0.6)
Clone
You can can create a copy of an existing color object using clone():
color.clone() // -> New color object
And more to come...
Propers
The API was inspired by color-js. Manipulation functions by CSS tools like Sass, LESS, and Stylus.
