Color therapy is the use of color in a variety of ways to promote health and healing. The different colors we see in the world around us are the result of the eye perceiving light vibrating at different frequencies. Sunlight, or full-spectrum light, holds all the wavelengths of color in the visible spectrum (red, orange, yellow, green, blue, indigo, violet, and magenta) as well as infrared and ultraviolet light, which cannot be seen. Used to treat both physical and emotional problems, color therapy may involve exposure to colored lights, massages using color-saturated oils, contemplating and visualizing colors, even wearing colored clothing and eating colored foods.