I have a large, light grey fire place in my living room. It is Victorian, as is the house, and quite plain. The marble is a very light grey with "veins". My problem is that I want to decorate the living room and I don't know what colours I can use. Can I only use white or grey? How careful do I need to be about matching the colour on the walls to the marble? I want to have a colour scheme that works, but ideally I want to avoid just painting everything white. Help!