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#!/usr/bin/env ruby
require 'term/ansicolor'
class String
include Term::ANSIColor
end
def print_color(c)
color = Term::ANSIColor::Attribute[c]
text = [
Term::ANSIColor::Attribute.nearest_rgb_color('#000'),
Term::ANSIColor::Attribute.nearest_rgb_color('#fff'),
].max_by { |t| t.distance_to(color) }
print ("%3u #{color.rgb.html} " % c).on_color(color.name).color(text.name)
end
if Term::ANSIColor.true_coloring = ENV['COLORTERM'] =~ /\A(truecolor|24bit)\z/
puts "True colors".bold, ""
step = 36
(0..255).step(step) do |g|
(0..255).step(step) do |r|
(0..255).step(step) do |b|
print Term::ANSIColor.on_color(Term::ANSIColor::RGBTriple.new(r, g, b)) { ' ' }
end
print ' '
end
puts
end
puts
(0..255).step(4) do |g|
print Term::ANSIColor.on_color(Term::ANSIColor::RGBTriple.new(g, g, g)) { ' ' }
end
puts
puts
end
Term::ANSIColor.true_coloring = false
puts "256 colors".bold, ""
for c in 0..3
print_color c
end
puts
for c in 4..7
print_color c
end
puts
puts
for c in 8..11
print_color c
end
puts
for c in 12..15
print_color c
end
for c in 16..231
(c - 16) % 6 == 0 and puts
(c - 16) % 36 == 0 and puts
print_color c
end
puts
for c in 232..255
(c - 16) % 6 == 0 and puts
print_color c
end
puts
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