What about siamese as a color? I actually suggested this a long time ago but was shot down pretty quick because users said it would be too much to have 'patterns' on pets. Ironically, the color calico was also brought up in my thread a while back too haha and since it turned out amazing I figured I'd try again with my idea. Anyways, siamese coloration can be found in a number of animals like rabbits,guinea pigs,gerbils,cats, and so on so it's not like I'm using only cat colors for inspiration. Also, we could still have variation in the colors like calico because the points and coat coloration come in a varity of colors. There's seal,chocolate,lilac,blue,flame, and so many other color points. The coat itself can be white to a dark tan so it could definitely work.
Here's an example...I have to say I slopped these together super fast...like really fast lol.I figured I didn't have to give an extremely detailed/creative take on it since it's a basic idea and if it's made a color the artists will put their wonderful take on it :)
http://i1129.photobucket.com/albums/m518/Noopleberry/examp.png