The color of the wall depends largely on your tastes and style. In your case, if you do not want to risk too much, a sand or roasted tone would be wonderful. Anyway, if you dare with something more striking, you could create a white socket at the bottom of the wall and finish it off with a molding. At the top we suggest you paint in stripes, horizontally and quite wide. A good color is green, combining stronger tones with other more lowered ones always within the same color range.