Im trying to pick out coordinating floor tile and backsplash. I am putting in white subway tile in the shower and around toilet. I want the backsplash to have some bright funky mosiac design. We are looking at bubbles and round penny tile. I dont know what to do on the floor. We like a medium gray, but does that go with green or orange backsplash? We were also looking at a hex shape for floor, but dont want to mix too many shapes. Is there a rule we should follow?