Paint your bathroom walls a clean, crisp white. Black trim will contrast nicely, and give a more modern look against the gray and pink tile.
Replace or paint any bathroom cabinets white. Provide extra storage with a white space saver organizer placed over the toilet area.
Provide privacy with black and white toile, check or striped curtains.
Update towel racks and toilet paper holders with contemporary fixtures in chrome or black wrought iron.
Hang a shower curtain with a small, black and white pattern.
Purchase new towels and a floor mat in white, with black trim or pattern.
Collect dirty laundry in a black wicker hamper.
Hang one or two small black-and-white photos, or paintings mainly in those colors. Black or silver frames will complement the art.
Display pink flowers in a black, white or silver small vase for a feminine touch.