The garnet upholstery of your sofa greatly determines the choice of the color of the walls. A safe bet is white or clear vanilla, with this range you will always be right and you will be able to enhance the natural light that enters through the double window. Anyway, you prefer to opt for some more striking color. A very decorative proposal is to paint a single wall of a tone similar to that of the sofa, but lowered. I would also dress the living room to create a mid-height plinth, paint the lower part in a neutral color and the upper part in a strong toast or a albero tone. These colors go great with wood. To separate them, place a wooden ribbon and paint it blank, just like the plaster molding on the ceiling. As for the floor, you can cover it with a mat that keeps the environment cold.