喜形於色

face light up with delight (idiom); to beam with joy

to be fond of / to like / to enjoy / to be happy / to feel pleased / happiness / delight / glad

to appear / to look / form / shape

surname Yu / Taiwan pr. [Yu2]

(literary) Oh! / Ah!

(of time or place) in; at; on / (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for / (indicating a source) from; out of / (used in comparison) than / (used in the passive voice) by

to show one's feelings / to show it in one's face

color / CL:種|种[zhong3] / look / appearance / sex

(coll.) color / used in 色子[shai3 zi5]