Ash-pink, transient shades of gray in combination with dark brown create a very harmonious symbiosis. In the decor of a bedroom you can use shades of gray as a leading color, select lighter shades for walls and dark for furniture and textiles.
Black and white is a traditional color scheme, obviously, but adding red into the mix just requires the colors to a completely new degree of energy. Black is best utilised in little doses as an accent. Somewhat black will go a ways.