Most bathrooms are on the small side, as rooms go! And most folks I meet with are terrified of using dark, saturated colors in that small space. “Small spaces demand lighter colors.” THAT’S a rule I say you can break.
Size isn’t everything, so use colors you love. After all, who wants a boring bathroom? If you love bright or deep colors, don’t be shy about using them even in compact spaces. The life and energy they give will be worth the visual shrinkage of the room. Plus, using a deep neutral shade for the walls (which will recede) with bright items (which will advance) creates an interplay of depth that can actually make a room feel bigger.
Balanced by lots of white (LOVE white in a bathroom!) and accented with pops of color, dark walls can be the strong design element that makes your bathroom unique, personal and ANYTHING but boring!
Here’s another bathroom to illustrate:
And here’s a lovely little home office as another illustration of this concept. This same color scheme could be translated to a bathroom of any size. Have fun with color, fear not dark walls in a small space!