Testing terminal colors

terminal_ansicolors.rb

require 'rubygems'
require 'term/ansicolor'

COLORS = ['black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white']

class String
  include Term::ANSIColor
end

(0..15).each do |x|
  (0..15).each do |y|
    print "  ".send("on_#{"intense_" if y > 7}#{COLORS[(y+x)%COLORS.size]}")
  end
  print "\n"
end

terminal_colors.rb

COLORS = {
  :black => "tput setab 0",
  :red => "tput setab 1",
  :green => "tput setab 2",
  :brown => "tput setab 3",
  :blue => "tput setab 4",
  :purple => "tput setab 5",
  :cyan => "tput setab 6",
  :lightgrey => "tput setab 7"
}

script = ""
script << "tput clear\n"

(0..7).each do |x|
  (0..COLORS.size-1).each do |y|
    script << "tput cup #{x} #{y*2}\n"
    script << "#{COLORS[COLORS.keys[(y+x)%COLORS.size]]}\n"
    script << "echo '  '\n"
  end
end

system script