A simple patch for String to colorize the output in the terminal.

colorize.rb

class String
  def black;   "\e[30m#{self}\e[0m" end
  def red;     "\e[31m#{self}\e[0m" end
  def green;   "\e[32m#{self}\e[0m" end
  def brown;   "\e[33m#{self}\e[0m" end
  def blue;    "\e[34m#{self}\e[0m" end
  def magenta; "\e[35m#{self}\e[0m" end
  def cyan;    "\e[36m#{self}\e[0m" end
  def gray;    "\e[37m#{self}\e[0m" end
end

# puts "This is green".green
# puts "Blue is here".blue