White rooms are popular for a couple of reasons. They complement a modern, minimalist aesthetic, and they don't compete with other bold design choices. Clean is the buzzword most people use when opting for white, but it's a myth that white walls make a room look larger. Color creates depth and interest, and our eyes tend to move from darker colors to lighter colors. This is what allows us to judge the distance between two walls and what creates the illusion of space -- or the lack thereof.