Colored strings with ruby
…much more funny with awesome print gem:

$ gem install awesome_print
ruby-1.9.2-p0 > require 'ap'
ruby-1.9.2-p0 > "my string".method(:green)
=> #<Method: String#green>
ruby-1.9.2-p0 > "my string".green
=> "\e[1;32mmy string\e[0m"
UPD: Colored