Start with Deep Plum on the vanity, because in a bathroom a moody color works best down low where you can really live with it. It turns an everyday vanity into the quiet centerpiece of the room, and against tile and mirrors that deep, wine-soaked tone reads as luxurious rather than heavy. It is the kind of color that feels wonderful by candlelight at the end of a long day.
To keep the room breathing, wrap the walls in Soft Gray, a warm, easy neutral that softens everything and lets the plum stay the star. Then crisp it all up with Warm White on the trim and around the window, so the edges feel fresh and clean. Plum on the vanity, soft gray on the walls, white on the trim, that is all it takes for a bathroom that feels rich, calm, and grown-up.