# File lib/paint.rb, line 178
    def rgb(red, green, blue, background = false)
      if mode == 8 || mode == 16
        "#{background ? 4 : 3}#{rgb_like_value(red, green, blue, mode == 16)}"
      else
        "#{background ? 48 : 38}#{rgb_value(red, green, blue)}"
      end
    end