Red fabric dye is a type of crafting component in Divinity: Original Sin II. Red dye which can be used to disguise a poison bottle as a healing potion. In spite of its name it cannot be used to change equipment colours.
Divinity Wiki
Small Poison Potion plus Red Fabric Dye equals : r/DivinityOriginalSin
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Divinity Original Sin 2 Wiki
This is what happens if you drink the Witch's Potion with the Vulture armor on… : r/DivinityOriginalSin
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