An idea, Take what hairstyles we have now. Then create an unlockable quest to open up more options on HOW the 2 color tone shades work. This way could create a whole new look!
Example
https://www.polyvore.com/cgi/img-thi...&tid=141544211
https://s-media-cache-ak0.pinimg.com...a4bb1a16db.jpg
As you see its not just a dipped or shade that could be hidden, but a true 2 color style.
