On the other side of the color wheel, cool colors include purples, blues, and greens. Most cool colors are associated with calming effects and are good for making rooms seem larger and colder. Plan well in sunny, naturally bright rooms for more uplifting effects. Cool colors are often associated with productivity, calmness, stability, imagination, and luck. Deep greens and soft blues make great colors for spaces like libraries, studies, and reading nooks. Imagine a beautiful blue room on a rainy day, a cozy reading nook by a window, your favorite hot drink beside you, and a new book in your hands!