"I just pictured darker skin, I didn't take it all the way to black..."
What does that even mean? It also makes me sad that readers apparently need to be spoon-fed descriptions. An author has to overtly say THIS CHARACTER IS BLACK ?? I always pictured all three characters as black, including Cinna, although I'm not going to go back and sift through the books for descriptions of him because I am too lazy.
Besides, you can picture characters however you like, the books still exist without the movie.