A black & white color scheme in a space is a very polished and sophisticated look, but at times this color scheme may become monotonous and somewhat too formal. A great complimentary color for that timeless color scheme is yellow. Yellow paired with black and white give a playful and contemporary quiet sophistication to a room. Pairing items in odd numbers, or better yet threes, is more appealing to the eye, so giving a black & white room a splash off yellow (or another color depending of your taste) will add interest and style to a space, but make sure there is thought in the placement, just not "there." I love black, white, and yellow together because to me it gives off a almost new age-retro feeling with a pop of sunshine, very refreshing and always a crowd pleaser. But caveat emptor, one must be fully committed to this color scheme and look and love it dearly before applying it, because of it's borderline trendy look, you might be "over it" before you know it!