chromatic (adj.)youdaoicibaDictYouDict[chromatic 词源字典]
1590s (of music), "progressing by half-tones;" 1831 as "pertaining to color," from Latin chromaticus, from Greek khromatikos "relating to color, suited for color," from khroma (genitive khromatos) "color, complexion, character," but chiefly used metaphorically of embellishments in music, originally "skin, surface" (see chroma).[chromatic etymology, chromatic origin, 英语词源]