A powder room is the one spot where you can be a little braver with color, and olive is a lovely place to start. Morning Olive on the walls feels soft and grown-up — it is green, but the gray in it keeps things quiet, which is exactly what you want in a room this size.
To keep it from feeling heavy, I lean on light, warm neutrals. Soft Linen on the trim and ceiling brightens everything up, while Warm Oat on the vanity adds a gentle creamy layer. Honeyed Oak for any wood or flooring brings in a touch of warmth so the olive does not feel cold.
The fun part is Deep Forest. Use it in small doses — a vanity, a mirror frame, maybe the door — and it gives the whole space a little depth and a modern, of-the-moment feel without taking over.