Start with Muted Sage on the walls. It is a soft, gently grayed green that calms a bathroom down the moment you walk in, like a quiet exhale at the end of the day. Because it leans cool and muted instead of bright, it never feels loud against tile or steam, and it makes even a small room read fresh and spa-like.
To keep it from feeling heavy, wrap the trim, vanity, and ceiling in Crisp White. It is a warm, paper-soft white that brightens the corners and lets the sage breathe. Then bring in Honey Oak as your accent, on a wood stool, a mirror frame, or open shelving, for a little natural warmth that stops the cool greens from going flat. Sage on the walls, white on the trim, and one honey-wood touch is all you need.