I don't know what kind of answer you're looking for. Natural stone has a host of tones -- browns, grays, white, yellows, sometimes a peach. You should be able to go with either a cool color here or a warm one, from bluish gray to yellowish cream. Grab a bunch of sample chips that you like from your local paint store and you'll quickly get a sense of what works and what doesn't. Or try an online color analyzer. Computer screens are poor ways to judge color.