coloration

n.

染色，着色；

1. The absence of coloration in that drawing makes it dull.
   那幅画因没有著色而显得晦暗。
2. This piece of cloth has bad coloration.
   这块布料染的不好。

The evolution of human skin coloration.
Plumage coloration is a sexually selected indicator of male quality
The evolution of conspicuous coloration: Some experiments in bad taste
STRUCTURAL PLUMAGE COLORATION, MALE BODY SIZE, AND CONDITION IN THE BLUE-BLACK GRASSQUIT
Pleiotropy in the melanocortin system, coloration and behavioural syndromes
Female sticklebacks use male coloration in mate choice and hence avoid parasitized males
Structural and melanin coloration indicate parental effort and reproductive success in male eastern bluebirds
The effect of male coloration on female mate choice in closely related Lake Victoria cichlids ( Haplochromis nyererei complex)
Evolution of sexual dichromatism: contribution of carotenoid- versus melanin-based coloration
Differential effects of endoparasitism on the expression of carotenoid- and melanin-based ornamental coloration