What is the name for a dillute chocolate pit bull? It looks like a blue sort of but it's not....?

Someone told me it was a fawn something I think, and I know in rabbits it would be considered a lilac. Is lilac the name for it? AKC just says that almost all colors are accepted but doesn't give a list of all possible colors and the descriptions for them:( I'm really curious, they are so beautiful...I think one day I'd like a blue "nose" (lol at the slang) pit and whatever this new color is I keep seeing!