I think a cool, dark accent color behind the fireplace would bring a lot to the living room. The dark accent wall, fireplace and custom wood floors add warmth to this open, modern living room. Big windows flood the space with tons of natural light.
Benjamin Moore Nightfall paint color - I'm thinking of painting the living room a dark gray to contrast with all the white paint (trim, fireplace, moldings) in there. --- Good for office/downstairs living room - something dark and dramatic