A dye & glamour system like GW2.

Glamour - Any gear that you use (or specificially "unlock") is available for your glamouring needs. No need to keep the original piece - the image is saved in a wardrobe tab.
Dyes (a) - Most gear pieces have at least 2-4 dyeable sections, which can be dyed different colors
Dyes (b) - Also, once you obtain a dye, it is saved permanently without needing to buy more.


I know a common argument against permanent dyes is that it would kill the demand on these items since people only have to purchase them once. It definitely hasn't killed the market in GW2. They have 450+ dyes available, and they are always releasing more. Makes for a fun collectible item. I've been working at my set for years, not even half-way done.