create a cozy modern living room with a serene atmosphere use soft beige and warm gray tones for the walls and sofa add an abstract painting in earthy brown and black tones on the wall illuminate the room with soft warm lighting from wall sconces and a floor lamp place a dark wood coffee table with decorative items on a gray striped rug feature dark leather armchairs with light beige cushions use rich natural wood flooring to complete the inviting and elegant setting