Moon's HemaLeaf 7° (Maple J-VHS-7): Technical Specification of a Numerically Specified Seven-Grade Colour Scale for Catheter-Monitored Gross Haematuria, version 2.2

This record defines the normative colorimetric specification of HemaLeaf 7°, a seven-grade visual reference for gross haematuria observed in the flowing segment of transparent catheter drainage tubing. Each grade is fixed as an sRGB coordinate (IEC 61966-2-1) with CIELAB reference values (D65, CIE 1931 2° observer). The document states CIEDE2000 inter-grade differences (adjacent range 9.72–34.04; no rank inversion across 21 pairs), strictly monotonic lightness, dichromacy simulations, viewing conditions, a display self-check, print quality-control criteria (per-swatch ΔE00 ≤ 3.0), a three-zone escalation framework of proposed default responses, scope limitations and prior art. It contains no human-subject data and makes no performance claims; empirical validation will be reported separately. Competing interest: the author has pending Korean trademark applications (40-2026-0068724, 40-2026-0068725) and a design registration under examination. The licence does not extend to these names or design rights.