Love the purple walls (I can't find the source of this image which is mighty annoying) I love the color scheme but rather in a bedroom or living room. Dark purple walls, gray wainscot, white ceiling and marble gray floor. Metal or silver details.
Check out the toilet paper holder- pets will not pull. Chic powder room features top half of walls clad in beige geometric wallpaper and lower walls clad in decorative moldings lined with a gray vanity, Restoration Hardware St.