Start with Slate Blue on the walls. It is a quiet, slightly grayed blue that wraps a bedroom in a calm, end-of-the-day feeling, the kind of color that helps your shoulders drop the minute you walk in. It is soft enough to live with every day, never loud, and it shifts gently with the light from cooler in the morning to almost gray at dusk.
For the trim, lean on Warm Greige. It is just creamy enough to keep the room from feeling cold, and it frames the blue walls with a cozy, grounded edge instead of a sharp white line. Then bring in Deep Indigo as your accent, the moody depth that makes the whole scheme feel intentional. Put it on a headboard, a chair, or your bedding. So: slate blue on the walls, warm greige on the trim and doors, and deep indigo saved for one or two accent pieces.