It's tough to create an aesthetically pleasing design using only warm and cool colors. That's where neutral colors come in. Neutral colors are the most subtle of the bunch and include black, white, gray, and various shades of brown. Technically, brown is a muted form of orange and is considered the warmest of the neutral hues.

Neutral colors are popularly used for typography, backgrounds, and wireframing. They can also be used to make accent colors stand out in your design but can be overpowered if not used properly.