The transformers. That's how Atlanta interior designer Barbara Westbrook of Westbrook Interiors
refers to color and paint. "There's no easier or more affordable way to change a space or create a mood," she points out in her new tome, Gracious Rooms
. The proof is in the pictures. Olive greens, café au lait taupes, bark-like brown-grays, dark chocolates—she wraps rooms in such nature-inspired shades for an effect both relaxing and elegant. And as often as not, the same color covers walls, casings, paneling, and built-ins. "Painting trimwork a contrasting color tends to chop up a room," she explains. "Covering it all in the same color lends a space some drama." Here, a few qualities that these velvety shades all share.