Simple color builder

color_builder.rb

count = ARGV[0].to_i
min = ARGV[1].to_i

def int_to_hex(r,g,b)
  "#%02X%02X%02X" % [r, g, b]
end

arr = []

r = 255
g = min
b = min

g.upto(255){|green| arr << {:r => r, :g  => green, :b => b}}
g = 255

r.downto(min){|red| arr << {:r => red, :g  => g, :b => b}}
r = min

b.upto(255){|blue| arr << {:r => r, :g  => g, :b => blue}}
b = 255

g.downto(min){|green| arr << {:r => r, :g  => green, :b => b}}
g = min

r.upto(255){|red| arr << {:r => red, :g  => g, :b => b}}
r = 255

b.downto(min){|blue| arr << {:r => r, :g  => g, :b => blue}}
b = min

increaser = arr.size/count


result = []
count.times{|i| result << arr[i*increaser] }

puts result.map{|c| "<div style='background-color: #{int_to_hex(c[:r], c[:g], c[:b])}; width: 16px; height:16px; float:left;'></div>" }.join