This color combination is the best combination you can ever make. These two colors. It express elegance, power and refinement. That is the maximum contrast you can ever reach, because they come from each end of the color spectrum. When decorating a home with combination of black & white colors you will instantly enter a sophistication, class and fashionable tone in your home.
Black color is not so often used in interior design because of its negative features: it can absorbs all the energy coming towards you, and it enshrouds the personality if it is not used right. But you can use it in the bathroom, that way it will get more sophisticated and sleek look. Properly combined, black can look really dramatic and elegant at the same time. However, if you plan to use it you should always have in mind that this is dominant and to be wary of how much is enough. Give preference to the white and use some extra bright details that will highlight the perfect elegance of these two colors in your dream bathroom.