I’d keep the walls a soft, warm white, maybe a hint of light grey. Then choose one pastel—think blush pink, mint or a pale lilac—and add it in a single place: a small, plush throw on a sleek sofa, a delicate vase, or a framed watercolor. Add a gentle, warm lamp or fairy lights so the room feels like a gentle glow. A light, airy rug with a subtle pattern would bring texture without clutter. The key is to let the pastel breathe and let the rest stay quiet, so the room feels dreamy, cozy, and entirely yours.