Mid-century homes often still sport their original pastel tile. Black & white accents can make them look purposeful. A wall covered with "renter's wallpaper" (peels off easily) or large-scale black & white art/photography are nice accents. Here they've changed the light fixture to an inexpensive bar, added a nice medicine cabinet/mirror, and a new faucet. What a difference!
Want a black and pink bathroom so bad - maybe this with pink accessories would be fun but still grown up :)