What is the meaning of Coloration?

The act or art of coloring.

The quality of being colored.

A notational device for indicating hemiola through either use of red ink (in mensural black notation) or black noteheads (in mensural white notation).

Ornamental division (also called passaggi, glosas, diminutions. etc.) employing rapid black notes.

Political tendency.

(Can we clean up this sense?) This when a consonant bleeds one of the qualities to the next vowel before the consonant disappears. This can describe PIE Laryngeal Theory

color; coloring; coloration

Source: wiktionary.org