Don't you want to add colors on your white and boring walls? Why not try this idea from bhg.com
An all-white wall may seem like it needs an explosion of color to dress it up, but you can create an equally impressive display by going with soft, subtle shades. Petunias and geraniums are the perfect choice for adding color either way.
A. Geranium (Pelargonium 'Orbit Pink')
B. Swan River daisy (Brachyscome iberidifolia 'Lemon Mist')
C. Petunia Surfinia Patio White