I saw some rims that looked really nice and were yes red... The top flat part where the spokes went through the wheel was red, but the sides of the rims (where the excel writing normally is) where the reglar aluminum color. Looked very trick and I've only seen it once. It keeps it red, but it's not overkill.
As for hubs, If we're going a lot of red around there Chain guide, caliper guard, etc.. let's go polished. If everything else around there is polished, let's go red. Remember, contrast the parts so they stand out.