Wrapping the walls in Powder Blue gives a nursery that quiet, settled feeling you want for a little one. It is soft and barely there, more like a calm sky than a true blue, so the room stays gentle in morning light and never feels cold. This is the color that does most of the work, and it reads sweet without tipping into baby-ish.
To keep it warm, bring in Soft Cream on the trim, doors, and window frames. It is creamier than plain white, so it hugs the blue instead of fighting it and softens every edge. Then add small hits of Warm Honey through a rocking chair, a basket, or a wood frame to ground the whole scheme and give it a little richness. So blue on the walls, cream on the trim, and honey kept to the wood and small details.