If you’re planning nursery décor, your color choice may be more than just a preference. Inspired by a few celebs’ favorite hues, expert color theorist Dewey Sadka and Serena Dugan, co-founder of premier linens and décor company Serena & Lily, combined color personality theory with decorating advice to help you create your ideal baby retreat. Plus: nursery feng shui and a baby registry for the real world. By Bonnie Siegler.