Today's homes don't need to rely on accessories for color. Check out this Kohler website for colorful bathroom ideas: KOHLER: Trends: Color Fixtures: Bathroom: Articles
I prefer color to boring white and neutrals, but it depends on the room and the effect you want. I like shades of one color in a room with accents--more than one is good. That brightly colored sink in one of the photos is a bit busy for my taste though. And you don't want to overwhelm a small bathroom.