diff --git a/lib/prettyjson.js b/lib/prettyjson.js
index fc53795..b8f1be0 100644
--- a/lib/prettyjson.js
+++ b/lib/prettyjson.js
@@ -1,11 +1,18 @@
 'use strict';
 
 // ### Module dependencies
-require('colors');
+var colors = require('colors');
 var Utils = require('./utils');
 
 exports.version = require('../package.json').version;
 
+var supportedColors = (function(){
+  var validColors = colors.styles;
+  for(var key in colors.maps)
+    validColors[key] = colors.maps[key];
+  return validColors;
+})();
+
 // ### Render function
 // *Parameters:*
 //
@@ -27,13 +34,13 @@ exports.render = function render(data, options, indentation) {
   indentation = indentation || 0;
   options = options || {};
   options.emptyArrayMsg = options.emptyArrayMsg || '(empty array)';
-  options.keysColor = options.keysColor || 'green';
-  options.dashColor = options.dashColor || 'green';
-  options.numberColor = options.numberColor || 'blue';
+  options.keysColor = supportedColors[options.keysColor] ? options.keysColor : 'green';
+  options.dashColor = supportedColors[options.dashColor] ? options.dashColor : 'green';
+  options.numberColor = supportedColors[options.numberColor] ? options.numberColor : 'blue';
   options.defaultIndentation = options.defaultIndentation || 2;
   options.noColor = !!options.noColor;
 
-  options.stringColor = options.stringColor || null;
+  options.stringColor = supportedColors[options.stringColor] ? options.stringColor : null;
 
   var output = [];
 
diff --git a/test/prettyjson_spec.js b/test/prettyjson_spec.js
index c9b0dea..e2dba54 100644
--- a/test/prettyjson_spec.js
+++ b/test/prettyjson_spec.js
@@ -346,3 +346,33 @@ describe('prettyjson.renderString() method', function(){
     output.should.equal('test: '.green + 'OK'.red);
   });
 });
+
+describe('Colors Validation', function(){
+  it('should output the string with default scheme if invalid colors are provided', function(){
+    var input = {param1: 'first string', param2: 'second string'};
+    var output = prettyjson.render(input, {keysColor: 'orange', stringColor: 'pink'});
+
+    output.should.equal([
+      'param1: '.green + 'first string',
+      'param2: '.green + 'second string'
+    ].join('\n'));
+  });
+
+  it('should output the number with default scheme if invalid colors are provided', function(){
+    var input = {param1: 17, param2: 22.3};
+    var output = prettyjson.render(input, {numberColor: 'pink'});
+
+    output.should.equal([
+      'param1: '.green + '17'.blue,
+      'param2: '.green + '22.3'.blue
+    ].join('\n'));
+  });
+
+  it('should output the number with default scheme if invalid colors are provided', function(){
+    var input = {param1: ['pretty']};
+    var output = prettyjson.render(input, {dashColor: 'pink'});
+    
+    output.should.equal('param1: '.green +'\n  '+ '- '.green + 'pretty');
+
+  });
+});