血けっ紅こう色しょく

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Meanings

1

noun

blood red; sanguine

rare term

Rare literary or technical term for the color of blood; in everyday language, 血のような赤 or 暗赤色 are more common.

暗あん赤せき色しょく
暗赤色 is a more common term for dark red, often used in medical or descriptive contexts, while 血紅色 is rarer and more literary.
血ちのような赤あか
血のような赤 is a common everyday phrase meaning 'blood-like red', whereas 血紅色 is a formal compound.

Compound of 血 (blood), 紅 (crimson), and 色 (color). The exact historical derivation is uncertain; it is a rare Sino-Japanese color term.