Extends String object with properties that returns colorized values of string. Can be useful for "console.log" output.

string.colors.node.js

function StringStyler () {
  function add (color, value) {
    String.prototype.__defineGetter__(color, function(){
      return "\u001b[" + value[0] + "m" + this + "\u001b[" + value[1] + "m";
    });
  }
  var codes = {
      reset: [0, 0],

      bold: [1, 22],
      dim: [2, 22],
      italic: [3, 23],
      underline: [4, 24],
      blink: [5, 25],
      inverse: [7, 27],
      hidden: [8, 28],
      strike: [9, 29],

      black: [30, 39],
      red: [31, 39],
      green: [32, 39],
      yellow: [33, 39],
      blue: [34, 39],
      magenta: [35, 39],
      cyan: [36, 39],
      white: [37, 39],
      gray: [90, 39],

      bgBlack: [40, 49],
      bgRed: [41, 49],
      bgGreen: [42, 49],
      bgYellow: [43, 49],
      bgBlue: [44, 49],
      bgMagenta: [45, 49],
      bgCyan: [46, 49],
      bgWhite: [47, 49]
    };
  for (var i in codes) add(i, codes[i]);
}

Usage example

All available styles you can get from codes variable (see property name).

Code:

StringStyler();

// ...

console.log(
   "Blinked black string on red background".blink.black.bgRed
 + "\nItalic green string".italic.green
 + "\nUnderlined cyan string".underline.cyan
);

Result: