Japanese Color Atlas日本色譜しゅいろ · Vermilion · family red
朱色 (Shu-iro) is catalogued here as vermilion. Cinnabar red used on shrine gates, lacquerware, and seals.
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.
Name appears in at least one CC BY-SA Wikipedia traditional Japanese color list; HEX remains a Chroma Cathay digital approximation for design use.
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 朱沙/朱砂 (cinnabar, HgS) with Shōsōin-document citations.
RELATIONSHIP Cinnabar/vermilion is the mineral basis of 朱色; period texts call both natural and synthetic forms shu/shusa.
CAVEAT Mineral pigment context only; grinding fineness shifts the hue, so no single HEX is authoritative.
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