Midori
Midori is the Japanese word for green itself, defined as the hue lying between yellow and blue-green — presented here in its full, standard depth.
How it was dyed in 927
The Engishiki — the court regulations completed in 927 — records exactly what the palace dyehouse was allotted to dye this color. Quantities are per bolt of cloth; units are left in the original (1 kin ≈ 600 g, 1 shō ≈ 0.7 L in later standards — Heian equivalents are debated).
中緑 なかみどり Medium green
The Engishiki also gives scaled quantities for: 1 bolt of plain silk · 1 skein of silk thread.
Original text 原文
中緑綾一疋、〈紬綿・糸紬・東絁亦同、〉藍六囲、黄蘗大二斤、薪九十斤、帛一疋、藍五囲、黄蘗大一斤八両、薪卅斤、糸一絇、藍一囲、黄蘗大九両、薪卅斤、
Text: 『デジタル延喜式』校訂文（縫殿寮）, National Museum of Japanese History · 1900 printed edition (NDL)
Tints & shades
Harmonies within the tradition
Complementary and triadic companions, chosen from real traditional colors — not computed values.