What the subject says.
I keep seeing designs where, if you select certain rims from the garage, the inside or outside of the wheel is one color and the other is chrome, like this
I know it can be done, just go buy a '79 Z/28 from the autoshow and mess with the manufacturer colors and wheels.
I see it on cars other than the Z/28, though, so I was wondering how to do it. Google comes up with nothing.