This [ http://i47.tinypic.com/5v9hm9.jpg ] is what I've come up for, for the red dress. There's 18 colours in total since I tried to get a decent range. I just have to label them and sort out the dresses, before taking a few shots in game. Then I can post them ;D

All it takes is sliding the hue bar up and down, but I love having colour options.