also: しゅしょく
noun, noun which may take the genitive case particle 'no'
vermilion; cinnabar color
A bright reddish-orange color, traditionally associated with temples, torii gates, and seals. The reading しゅいろ is standard; しゅしょく is a rare alternate reading.
神社の鳥居は朱色に塗られている。
The torii gate of the shrine is painted vermilion.
彼女は朱色の口紅を好んで使う。
She likes to use vermilion lipstick.
From 朱 (vermilion) + 色 (color). The character 朱 originally referred to cinnabar, a red mineral used as a pigment.