Colorize warns as yellow

lib/jekyll.rb

@@ -25,6 +25,7 @@ require 'English'
 require 'liquid'
 require 'maruku'
 require 'pygments'
+require 'colorator'
 
 # internal requires
 require 'jekyll/core_ext'

lib/jekyll/logger.rb

@@ -17,7 +17,7 @@ module Jekyll
     #
     # Returns nothing
     def warn(topic, message)
-      $stderr.puts Jekyll.message(topic, message)
+      $stderr.puts (Jekyll.message(topic, message)).yellow
     end
 
     # Public: Build a Jekyll topic method