I like the upper mantel idea. The dark floor, dark wooden coffee table top and dark stone in the fireplace pull this room together. White walls, white slanted beam ceiling and doors going to the outside make this a great looking room.
Benjamin Moore Sea Haze is the next color on the wheel from Gray Owl which is in the adjacent kitchen. It is a blue/green/grey which changes throughout the day and also varies depending on the season. The ceilings are white washed pine boards.