I am planning on a dark green (verde tropical) granite counter top and would like to use either a biscuit or black silgranite sink. My backsplash is biscuit ceramic tile. Kitchen is traditional style with cherry cabinets wood flooring. I'm concerned the black may look too modern but the biscuit may be too much of a contrast with the dark counters. Any advice?

Stainless steel might be a good compromise. Stainless matches just about everything. Some people think of it as having a modern look, which it can, but it also works well in more traditional kitchens as well. You might check out Lavello sinks. We have a full line of stainless steel sinks and you can see in the photo gallery that they have been used a wide variety of kitchens.