Colors / Blue in Japan / Aomidori
Aomidori
青緑 · あおみどり
Halfway between green and blue, aomidori is the meeting point of the two — a saturated teal that refuses to settle on either side of the boundary.
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white 3.78 AA Large black 5.55 AA
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ja.wikipedia #0090A8
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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).
青緑 あおみどり Blue-green
For 1 bolt of plain silk
藍四囲fresh indigo leaves · 4 bundles
黄蘗二斤amur cork bark · 2 kin
薪卌斤firewood · 40 kin
Original text 原文
青緑帛一疋、藍四囲、黄蘗二斤、薪卌斤、
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.