colour.js - ANSI terminal colors

A cored, fixed, documented and optimized version of the popular colors.js. Can be used as a drop-in replacement, also works correctly in the browser, provides a CSS mode and has been compiled through Closure Compiler using advanced optimizations. Additionally, nearly every issue and pull request on the original has been incorporated.


npm install colour


This package extends the global String prototype with additional getters that apply terminal colors to your texts. Available styles are:


var colour = require('colour');
console.log('hello'.green); // outputs green text
console.log('i like cake and pies' // outputs red underlined text
console.log('inverse the color'.inverse); // inverses the color
console.log('OMG Rainbows!'.rainbow); // rainbow (ignores spaces)

Or: As a drop-in replacement for colors

var /* just name it */ colors = require('colour');

Custom themes

Its also possible to define your own themes by creating new getters on the String object. Example:

var colour = require('colour');
  silly: 'rainbow',
  input: 'grey',
  verbose: 'cyan',
  prompt: 'grey',
  info: 'green',
  data: 'grey',
  help: 'cyan',
  warn: ['yellow', 'underline'], // Applies two styles at once
  debug: 'blue',
  error: 'red bold' // Again, two styles

console.log("this is an error".error); // outputs bold red text
console.log("this is a warning".warn); // outputs underlined yellow text

console.log("this is green")); // Alternatively

Console, browser and browser-css mode

var colour = require('colour');
colour.mode = 'none'; // No colors at all
colour.mode = 'console'; // Adds terminal colors (default on node.js)
colour.mode = 'browser'; // Adds HTML colors (default in browsers)
colour.mode = 'browser-css'; // Adds special CSS (see examples/example.css)

Uninstalling / reinstalling on the global scope

If you have a reason to use a fresh String prototype in your application, you may also revert all extensions made.

var colour = require('colour');
colour.uninstall(); // Removes all custom properties from the String prototype
colour.install(); // Re-installs them

More features


Based on work started by Marak (Marak Squires), cloudhead (Alexis Sellier), mmalecki (Maciej Małecki), nicoreed (Nico Reed), morganrallen (Morgan Allen), JustinCampbell (Justin Campbell) and ded (Dustin Diaz).


The MIT-License (MIT)