Small rooms look calmer when the bed carries two colours at most. Pick one for sheets and one for the comforter or pillows.
Reti and Kaapi are the quietest pairing: sand and coffee, easy against white or clay walls.
Gulkand with Mitti feels warm and soft, good for rooms with wood furniture and brass.
If you want one bold note, use Anar on a pillow pair only. It lifts the whole room without crowding it.