chartjs-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.