MaterialColorizeJS

A library to convert a color to its closest on Google's Material Design Color Palette

There is a Java version available too!

Installing

The library is available as a node module. Use the --save flag to save this as a dependency in your package.json.

npm install materialcolorize

Once you have it installed, import the desired functions.

ES6:

    import { approximateColor, getColorFamily } from 'materialcolorize'
    // or
    import mc from 'materialcolorize'

ES5:

    var approximateColor = require('materialcolorize').approximateColor;
    // or
    var mc = require('materialcolorize');

If you plan on using this on the client side, I recommend using Browserify or Webpack to be able to require on the client side.

Usage

approximateColor(color)

Pass in a color as a hexstring or hexadecimal number and approximateColor will return the closest material color as a string.

Note: This function does not take 3 digit hex values yet, but that feature will be added in a later release.

    // returns '4CAF50'
    approximateColor('#4AAA58');

    // returns 'FF5722'
    approximateColor('F7642A');

    // returns '80DEEA'
    approximateColor(0x78E1F6);

=============

getColorFamily(color)

Pass in a color as a hexstring or hexadecimal number and getColorFamily will return the family palette of the input color. The keys represent each color's weight.

    let greenPalette = getColorFamily('ADCF83');
    // greenPalette is:
    {
      '50': 'F1F8E9',
      '100': 'DCEDC8',
      '200': 'C5E1A5',
      '300': 'AED581',
      '400': '9CCC65',
      '500': '8BC34A',
      '600': '7CB342',
      '700': '689F38',
      '800': '558B2F',
      '900': '33691E',
      'A100': 'CCFF90',
      'A200': 'B2FF59',
      'A400': '76FF03',
      'A700': '64DD17'
    }

=============

colorDistance(color1, color2)

Calculates the 'distance' between two colors by implementing this formula. approximateColor() uses this to and returns the material color with the minimum distance.

There are limited reasons to use this function alone, but one useful case is deciding whether to use black or white text on a colored background (this is an example that is used for the demo page to assign the color of the text over the family palette colors):

  let displayTextColor = (color) => {
    // If the input color (each color in the family palette) is 'closer' to black than it is to white,
    // set the overlying text color to white
    if(mc.colorDistance(color, '000000') < mc.colorDistance(color, 'FFFFFF')) {
      return 'FFFFFF';
    } else {
      return '000000';
    }
  }

Contributors

Made by Varun Munjeti and Hyunbin Park. Special thanks to Arjun Sarode for helping us get ES6 set up and with React for the demo page!