coloration (n.)youdaoicibaDictYouDict[coloration 词源字典]
1620s, from French coloration (16c.), from Late Latin colorationem (nominative coloratio) "act or fact of coloring," noun of action from past participle stem of Latin colorare "to color, to get tanned," from color (see color (n.)).[coloration etymology, coloration origin, 英语词源]