Start with Soft White on the walls. It is the kind of white that has a little warmth in it, so the room feels restful at night instead of cold or clinical. In a bedroom that gentle base bounces light around and makes the space feel bigger, while still giving you a clean canvas to build a sharp, modern look on top of.
Then bring in Inky Black on the trim, doors, and window frames for that bold black-and-white contrast that makes the whole room look intentional. Soften the edges with Warm Gray, a quiet greige you can carry into bedding, a headboard, or a single painted nook. So: white on the walls, black on the trim and frames, and warm gray as the cozy in-between that stops the scheme from feeling stark.