We have a small outdoor pool bathroom. It's all white, travertine floors, white sink and wc, walls are white although we plan to paint an accent wall probably Livable Green, my current favorite Sherwin Williams color in a pallet of pastel shades of blues and greens, pale lavender and soft gray. This mirror fits perfectly over the small white vanity with a white marble top. Will add some towels in white and the color of the accent wall.  Very clean, elegant look.
The mirror is the only decorative object in the room and it carries it!