白緑

びゃくろく

白緑 is the finely-ground, lighter grade of malachite (緑青), used for paler greens in painting.

Tobunken's 彩色DB records 白緑 (pale malachite) in Nara-period documents; CAMEO also catalogs it.

Mineral pigment context only; whiteness depends on grind, so the HEX is an approximation.