#!/usr/bin/ruby
#

require 'rubygems'
require 'rmagick'
require 'tempfile'
require 'osx/cocoa'

point = OSX::NSEvent.mouseLocation
x, y = point.x, point.y

tf = Tempfile.new(File.basename($0))

system("screencapture", tf.path)

img = Magick::Image.read(tf.path).first

pixel = img.get_pixels(x, img.rows - y, 1, 1).first
hex = '#%02x%02x%02x' % [:red, :green, :blue].map {|n| pixel.send(n) >> 8 }
puts hex

open("|pbcopy", "w") {|c| c.print hex }