a painting or decoration technique done in numerous shades of the same single color disregarding the actual color of the content.

Porcelain decoration using different tones of a single color

A painting, using varying shades of the same colour.

Camaïeu (also called en camaïeu) is a technique that employs two or three tints of a single color, other than gray, to create a monochromatic image without regard to local or realistic color. When a picture is monochromatically rendered in gray, it is called grisaille; when in yellow, cirage.