Please take a close-up photo of the countertop and floor and the art work you plan to keep. It looks as if you've got russet on the floor and a bit in the vanity, plus some gold and black in the countertop. Introducing a third color like dark green may be too dark for your small bathroom with its dark floor and vanity cabinet and too stark a contrast with the white toilet. My instinct would be a warm gold with reddish tones that harmonizes with the wood cabinet and floor would work best. This bathroom, with the exception of the light floor, is somewhat like yours. Note the bronze faucets and lighting hardware--also bringing out the russet.

Happy Valley residence · More Info

I like that color. It looks nice with the granite.