I know that there are several threads in which there is quite a debate as to just which of these categories a certain horse falls into. I found another horse that seems to be sitting along those fine lines of distinction who I thought it might be interesting to share.
He is listed as bay, but I'm sort of inclined to say that he's more of a brown. He's a 2yr BLM mustang currently up for adoption on their internet adoption site, so if you think he's cute you should adopt him!
(It doesn't work if I try to link the images directly so hopefully this link will work for those of you who are interested)