According to the theory of the art historian Marcia B. Hall, which has gained considerable acceptance, cangiante is one of four modes of painting colours available to Italian High Renaissance painters, along with sfumato, chiaroscuro and unione.[3] The word itself derives from the Italian cangiare (“to change”).

Cangiante is characterized by a change in color necessitated by an original color’s darkness or lightness limitation. For example, when painting shadows on a yellow object, the artist may use a red color simply because the yellow paint cannot be made dark enough. There are other methods of rendering shadows or highlights (for example, mixing the original hue with black or brown), but these can render the shadow color dull and impure. During the Renaissance, the variety and availability of paint colors were severely limited.
An early example of cangiante by Giotto from the Arena Chapel. Note the shift in color on the robes.

The greatest practitioner of the cangiante technique was Michelangelo,[4] especially in many parts of the Sistine Chapel ceiling. For example, in the image of the prophet Daniel, a transition from green to yellow is evident in the subject’s robes. After Michelangelo’s time, the technique found widespread acceptance and is now a standard painting technique.

Source: Cangiante – Wikipedia