淡たん青せい色しょく

た

ん

せ

い

しょ

く

Meanings

1

noun which may take the genitive case particle 'no'

rare term

A rare, formal-sounding color term for a light or pale blue shade. In everyday speech, 水色 (みずいろ) is far more common.

淡thin, faint, pale

青blue, green

色color

水みず色いろ
The common, everyday word for light blue. 淡青色 is a rarer, more formal or technical alternative.
空そら色いろ
Sky blue; similar in hue but more specifically evocative of a clear sky, while 淡青色 is a broader pale blue.

Compound of 淡 (たん, 'light, pale') + 青 (せい, 'blue') + 色 (しょく, 'color'). A straightforward Sino-Japanese color term.