Start with Muted Teal on the walls. It is soft and a little gray, so it never reads loud or babyish, just calm and grown-up in a way the room can grow into. In a nursery that means a space that feels restful for late-night feedings and gentle for naps, with enough color to feel intentional. It works for any baby, so you do not have to decide pink or blue.
Wrap it up with Warm Cream on the trim and the crib, which keeps the teal from feeling cold and adds a cozy, soft edge around the windows and door. Then bring in Soft Brass as your accent, in a small light fixture, a few drawer pulls, or a frame or two, for a warm glow that makes the whole room feel finished. Teal on the walls, cream on the trim, brass in the little details, and you are done.