Looks pretty black to me. I agree there was definitely variations of the sheen and tint of the black used, but any original wheels I have ever seen were either true black, or so dark of a gray that they looked black until you stuck your nose up close enough to bump it off the center cap.
My personal opinion is that black is ok, and very dark gray could also be correct, but they should "look" black from about 15-20 feet away. If they still look gray from that distance, they are too light.