Darth Vader button reference to help you recolor. Note that the belt lamps are a different shade of green.
http://i125.photobucket.com/albums/p64/Midnight_Trooper/Vader053.jpg
http://i125.photobucket.com/albums/p64/Midnight_Trooper/Darth_Vader_ANH_ESB_Helmet_31.jpg
http://i125.photobucket.com/albums/p64/Midnight_Trooper/HPIM4383-1.jpg