Apple might do that next year for the iPhone 6. LOL! I could only hope. They've got to first get the black non scratch surface perfected, then maybe we can see a Black and Gold iPhone. That'll definitely be a game changer.
Might be wildly popular.
If you want that look now, there are cases and decals sold to make your iPhone black and gold. Soon faceplates will be available. So there is a way.