color
JavaScript library for immutable color conversion and manipulation with support for CSS color strings.
const color = Color('#7743CE').alpha(0.5).lighten(0.5);
console.log(color.hsl().string()); // 'hsla(262, 59%, 81%, 0.5)'
console.log(color.cmyk().round().array()); // [ 16, 25, 0, 8, 0.5 ]
console.log(color.ansi256().object()); // { ansi256: 183, alpha: 0.5 }
Install
npm install color
Usage
import Color from 'color';
Constructors
// string constructor
const color = Color('rgb(255, 255, 255)') // { model: 'rgb', color: [ 255, 255, 255 ], valpha: 1 }
const color = Color('hsl(194, 53%, 79%)') // { model: 'hsl', color: [ 195, 53, 79 ], valpha: 1 }
const color = Color('hsl(194, 53%, 79%, 0.5)') // { model: 'hsl', color: [ 195, 53, 79 ], valpha: 0.5 }
const color = Color('#FF0000') // { model: 'rgb', color: [ 255, 0, 0 ], valpha: 1 }
const color = Color('#FF000033') // { model: 'rgb', color: [ 255, 0, 0 ], valpha: 0.2 }
const color = Color('lightblue') // { model: 'rgb', color: [ 173, 216, 230 ], valpha: 1 }
const color = Color('purple') // { model: 'rgb', color: [ 128, 0, 128 ], valpha: 1 }
// rgb
const color = Color({r: 255, g: 255, b: 255}) // { model: 'rgb', color: [ 255, 255, 255 ], valpha: 1 }
const color = Color({r: 255, g: 255, b: 255, alpha: 0.5}) // { model: 'rgb', color: [ 255, 255, 255 ], valpha: 0.5 }
const color = Color.rgb(255, 255, 255) // { model: 'rgb', color: [ 255, 255, 255 ], valpha: 1 }
const color = Color.rgb(255, 255, 255, 0.5) // { model: 'rgb', color: [ 255, 255, 255 ], valpha: 0.5 }
const color = Color.rgb(0xFF, 0x00, 0x00, 0.5) // { model: 'rgb', color: [ 255, 0, 0 ], valpha: 0.5 }
const color = Color.rgb([255, 255, 255]) // { model: 'rgb', color: [ 255, 255, 255 ], valpha: 1 }
const color = Color.rgb([0xFF, 0x00, 0x00, 0.5]) // { model: 'rgb', color: [ 255, 0, 0 ], valpha: 0.5 }
// hsl
const color = Color({h: 194, s: 53, l: 79}) // { model: 'hsl', color: [ 195, 53, 79 ], valpha: 1 }
const color = Color({h: 194, s: 53, l: 79, alpha: 0.5}) // { model: 'hsl', color: [ 195, 53, 79 ], valpha: 0.5 }
const color = Color.hsl(194, 53, 79) // { model: 'hsl', color: [ 195, 53, 79 ], valpha: 1 }
// hsv
const color = Color({h: 195, s: 25, v: 99}) // { model: 'hsv', color: [ 195, 25, 99 ], valpha: 1 }
const color = Color({h: 195, s: 25, v: 99, alpha: 0.5}) // { model: 'hsv', color: [ 195, 25, 99 ], valpha: 0.5 }
const color = Color.hsv(195, 25, 99) // { model: 'hsv', color: [ 195, 25, 99 ], valpha: 1 }
const color = Color.hsv([195, 25, 99]) // { model: 'hsv', color: [ 195, 25, 99 ], valpha: 1 }
// cmyk
const color = Color({c: 0, m: 100, y: 100, k: 0}) // { model: 'cmyk', color: [ 0, 100, 100, 0 ], valpha: 1 }
const color = Color({c: 0, m: 100, y: 100, k: 0, alpha: 0.5}) // { model: 'cmyk', color: [ 0, 100, 100, 0 ], valpha: 0.5 }
const color = Color.cmyk(0, 100, 100, 0) // { model: 'cmyk', color: [ 0, 100, 100, 0 ], valpha: 1 }
const color = Color.cmyk(0, 100, 100, 0, 0.5) // { model: 'cmyk', color: [ 0, 100, 100, 0 ], valpha: 0.5 }
// hwb
const color = Color({h: 180, w: 0, b: 0}) // { model: 'hwb', color: [ 180, 0, 0 ], valpha: 1 }
const color = Color.hwb(180, 0, 0) // { model: 'hwb', color: [ 180, 0, 0 ], valpha: 1 }
// lch
const color = Color({l: 53, c: 105, h: 40}) // { model: 'lch', color: [ 53, 105, 40 ], valpha: 1 }
const color = Color.lch(53, 105, 40) // { model: 'lch', color: [ 53, 105, 40 ], valpha: 1 }
// lab
const color = Color({l: 53, a: 80, b: 67}) // { model: 'lab', color: [ 53, 80, 67 ], valpha: 1 }
const color = Color.lab(53, 80, 67) // { model: 'lab', color: [ 53, 80, 67 ], valpha: 1 }
// hcg
const color = Color({h: 0, c: 100, g: 0}) // { model: 'hcg', color: [ 0, 100, 0 ], valpha: 1 }
const color = Color.hcg(0, 100, 0) // { model: 'hcg', color: [ 0, 100, 0 ], valpha: 1 }
// ansi16
const color = Color.ansi16(91) // { model: 'ansi16', color: [ 91 ], valpha: 1 }
const color = Color.ansi16(91, 0.5) // { model: 'ansi16', color: [ 91 ], valpha: 0.5 }
// ansi256
const color = Color.ansi256(196) // { model: 'ansi256', color: [ 196 ], valpha: 1 }
const color = Color.ansi256(196, 0.5) // { model: 'ansi256', color: [ 196 ], valpha: 0.5 }
// apple
const color = Color.apple(65535, 65535, 65535) // { model: 'apple', color: [ 65535, 65535, 65535 ], valpha: 1 }
const color = Color.apple([65535, 65535, 65535]) // { model: 'apple', color: [ 65535, 65535, 65535 ], valpha: 1 }
Set the values for individual channels with alpha, red, green, blue, hue, saturationl (hsl), saturationv (hsv), lightness, whiteness, blackness, cyan, magenta, yellow, black
String constructors are handled by color-string
Getters
color.hsl()
Convert a color to a different space (hsl(), cmyk(), etc.).
color.object() // {r: 255, g: 255, b: 255}
Get a hash of the color value. Reflects the color's current model (see above).
color.rgb().array() // [255, 255, 255]
Get an array of the values with array(). Reflects the color's current model (see above).
color.rgbNumber() // 16777215 (0xffffff)
Get the rgb number value.
color.hex() // #ffffff
Get the hex value. (NOTE: .hex() does not return alpha values; use .hexa() for an RGBA representation)
color.red() // 255
Get the value for an individual channel.
CSS Strings
color.hsl().string() // 'hsl(320, 50%, 100%)'
Calling .string() with a number rounds the numbers to that decimal place. It defaults to 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.isLight() // true
color.isDark() // 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.lighten(0.5) // hsl(100, 50%, 0) -> hsl(100, 50%, 0)
color.darken(0.5) // hsl(100, 50%, 50%) -> hsl(100, 50%, 25%)
color.darken(0.5) // hsl(100, 50%, 0) -> hsl(100, 50%, 0)
color.lightness(50) // hsl(100, 50%, 10%) -> hsl(100, 50%, 50%)
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.grayscale() // #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.fade(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).grayscale().lighten(0.6)
Propers
The API was inspired by color-js. Manipulation functions by CSS tools like Sass, LESS, and Stylus.
