出典の根拠 Tobunken's 彩色DB records 緑青 (malachite) in the Nara-period green-system vocabulary.
関係 緑青 is the malachite mineral pigment that names this record; particle size grades it from deep to pale.
注意 Mineral pigment context only; the paler grade is 白緑. HEX remains a display approximation.
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