The monochromatic color scheme uses variations in lightness and saturation of a single color. This scheme looks clean and elegant. Monochromatic colors go well together, producing a soothing effect. The monochromatic scheme is very easy on the eyes, especially with blue or green hues. You can use it to establish an overall mood. The primary color can be integrated with neutral colors such as black, white, or gray. However, it can be difficult, when using this scheme, to highlight the most important elements.