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.
grey & white Interesting that the crown molding is painted gray to blend with the upper portion of the wall. This is a great Tim to avoid "boxing" a room by painting upper and lower trim. Either continue ceiling color onto upper, or wall, as here.