I'm getting mixed up in some nomenclature here. Wheels (rims?) and hub caps. As far as I know the wheels were never body color, always black. The hub caps (later version) were hardtop cover.
My car is light blue metallic (906) with dark blue hardtop (904) and dark blue (904) hub caps (which are in my garage since I'm driving around with bundt alloys).
In my previous life in Germany, I once bought a new R107. It was thistle (light) green metallic, olive (dark) green hardtop and olive green hub caps, ex-factory. At that time, a typical German choice, Americans would cringe.
I think the different colors make the car look more strechted.
Klaus
1969 280 SL