We are in the process of installing a new backsplash. I am not sure what type of outlet covers to use. The outlets are off white. My backsplash is a variegated white/ivory/sand subway tile, kind of light. I know I can't get an exact match, but what do you think would look best? A plain, off white cover, or a faux stone cover in a light sand color that still won't be an exact match? The tiles are not glossy, more of a matte finish if that helps.