It isn't just color that determines what product I use. I would use something different on a black SUV than I would use on a black Ferarri just because of the angles that you will see it from. Something tall and flat might not benefit as much with a product that looks best on something low and curvy.
I don't know anywhere that will give you the answer to your question. I definitely appreciate your situation though. That is a good question and I'm going to keep that in mind in future product recomendations and articles. It is still always opinion when someone tells you what looks best, but sometimes opinion is all you need. The answer to your question is in the eye of the beholder, so its really a tough one to answer.