A powder room is the one space where you can take a risk, and seafoam is the smart way to do it. This palette leads with Seafoam Mist, a soft gray-green that feels clean and a little spa-like without ever tipping into mint. On the walls of a small room it makes the space feel calm and a touch bigger than it is.
I kept the supporting cast warm on purpose. Warm Oat carries the vanity and any backdrop so the seafoam never feels clinical, and Crisp White on the trim and ceiling keeps the edges sharp. Walnut Brown is the grounding move here — a real wood tone on the vanity top or floating shelf that pulls the whole scheme out of cool territory.
For the finish, Deep Forest is your one bold note. Put it behind the mirror or inside a niche and let it do its job in a small dose. That contrast is what makes a powder room memorable, and because every shade maps to a paint you can actually mix at the store, this is a scheme you can build, not just admire.