Mosaic with white ebony or white violet. My Candy is a white violet mosaic (love at first sight for me!), but she's still so young so although she's mostly white now she may develop spots later on.
I can't pick one color I love them all. The dark ebony are great. My nibbler is a wilson white and he is so pretty. One of my new fosters is a really neat Heterozygous Beige Chinchilla. I don't tend to like the beige but this one is really cool almost like a Brindle dog.