The phrase "white walls" refers to walls that are painted in the color white. It is a simple way to describe a clean and minimalist look for a room or space. Full definition
The colored floor goes well with white walls in the bathroom. (designtrends.com)
Moving away from the traditional white walls of an art gallery, the presentation challenges expectations and highlights the power of display. (artmattermagazine.com)
Your color scheme with white walls in first photo is simply fabulous. (theletteredcottage.net)