That's interesting, I hadn't really thought of it that way. I wonder if that's why the first colour grading exercise in the training material for BMD DaVinci R

That's interesting, I hadn't really thought of it that way. I wonder if that's why the first colour grading exercise in the training material for BMD DaVinci Resolve is an excerpt from a documentary about rhinos, where you need to balance a reasonably clean shot of a white woman, a gorgeous but fairly tricky shot of a black man (in profile, strong sunlight on his nose, eyes and cheek, rest in deep shadow), and a couple of mid and long shots of black gamekeepers walking around. There's a lot to get right and a lot to get wrong, and you can end up making everyone look a pretty sickly colour.