I think that simple white subway tile would look good with your granite. But you might also consider, for a more contemporary look, a newer subway style tile than the traditional 3 x 6. American Olean makes one that I like a lot and have used. It's called Urban Canvas and comes in a 4.25 x 12.75 size or a 4.25 x 8.5 size, in both glossy white and matte white. With a polished granite countertop, the matte white in either size would look fab.
Carolyn Albert-Kincl, ASID