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Colours made from quercitannic acid

1 colour that our sources say are made from quercitannic acid.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

Quercitron: Shaddack, Public domain, source

The weekly palette

Every Monday: seven colours you may not know, what the world is wearing this week, and one idea about colour.