One of my very favorite color schemes is blue and white. My office, dressing room and bathroom are predominantly decorated in blue and white- I had to stop myself from using this color scheme throughout the entire house! But I haven't been able to bring myself to paint a dark blue wall as in the third picture- isn't it stunning!
I think what attracts me is that the colors are timeless and classy and work with almost any style: modern, country, traditional, etc. Even the first image above with the modern patterned wallpaper won't go out of style because of the color combination. I'm not the only one loving this color combo, check out Carolyne Roehm's dreamy book, A Passion for Blue & White.
My very favorite from the above images is the blue and white bathroom- stunning! Which is your favorite?