noun
madder plant; Japanese madder; Rubia argyi
Refers to the plant itself, especially the species Rubia argyi, whose roots yield a red dye.
茜の根から赤い染料が採れる。
A red dye can be obtained from the roots of the madder plant.
noun
madder red; deep red
The color produced from madder dye; a deep, slightly brownish red. Often used in traditional Japanese color names.
夕焼けが茜色に染まっている。
The sunset is dyed in madder red.
Kana spelling is common, especially for the color sense.
Katakana spelling used in botanical contexts or for emphasis.
The origin is uncertain. The kanji 茜 is conventionally associated with the madder plant and its red dye.