Use the dark tile as bullnose at the edges, just above the counter and below the cabinets.
Lay a full tile at the front of the counter and bullnose, or round over, its edge.
Use a cut down tile beneath the bullnose at the front apron of the granite for the best edge results.
Use the same bullnose blade on the tile wet saw that will give you the edging for the rest of the counter to finish the interior edges of the kitchen sink.
Bullnose all your edges and undermount your sink for a clean, finished look.