noun, noun which may take the genitive case particle 'no'
orange-yellow; saffron color
Archaic color term referring to a yellowish orange, traditionally associated with the color of the kōji (柑子) citrus fruit. Rare in modern Japanese; mainly found in historical, literary, or traditional arts contexts.
Kōji-iro is known as a color combination for layered garments in the Heian period.
The base color of this old kimono is close to kōji-iro.
From 柑子 (kōji, a type of citrus fruit) + 色 (iro, color). The exact historical derivation is uncertain, but the term is associated with traditional Japanese color naming.