A named color for sappanwood red.
蘇芳 (Suō) is catalogued here as sappanwood red. Tobunken supports 蘇芳 as historical dyestuff/name context. No standard measured value is tied to this color record, so HEX is a modern display approximation.
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.