Japanese Color Atlas日本色譜ぐんじょういろ · Ultramarine · family blue
群青色 (Gunjō-iro) is catalogued here as ultramarine. Mineral ultramarine pigment, used in Buddhist painting.
Tobunken records the underlying color/material term in the Nara-period vocabulary database derived from 『大日本古文書』; this supports historical name attestation, not measured sRGB.
Traditional color names predate modern screen color spaces, so this HEX value is a design approximation rather than a material measurement.
These entries preserve historical material, pigment, dye, or alternate-graph evidence without treating it as a direct HEX source for this color.
SOURCE BASIS Tobunken's 彩色DB records 金青 (azurite) in Shōsōin construction documents.
RELATIONSHIP 金青 is the Nara-period term for the azurite blue behind 群青色; the later term 紺青 shifted toward Prussian blue.
CAVEAT Azurite pigment context only. 群青色's HEX is a modern display approximation, not a measured mineral value.
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