KanjiJLPT N1
Vermilion

vermilion, cinnabar, scarlet, red, bloody

Mnemonic

A comet has not yet burned out — instead it detonates in the atmosphere, showering the earth in vermilion sparks. Every shrine gate and every royal seal below is splashed with that sacred red-orange glow, as if the comet chose to die in the most magnificent color possible.
Additional thoughts
Picture the comet's tail already tinged red-orange, and the phrase 'not yet extinguished' keeps the vermilion blaze alive. The shrine-gate imagery reinforces the cultural weight of the color.
Quick recall
A comet not yet extinguished explodes into vermilion fire across the sky.

Details

The keyword for 朱 is vermilion. This kanji refers to a vivid red-orange pigment and color that has been highly valued in East Asian cultures for centuries. It is traditionally associated with the color of cinnabar, a mineral used to produce this distinctive bright red hue. The color carries connotations of authority, sacredness, and celebration, often seen in the gates of shrines, official seals, and imperial contexts.
On'yomi
しゅ
Kun'yomi
あけ