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What visible light color did humans use to color jeans with?

User Duc Huynh
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Pigments for blue have come from azurite, ultramarine, smalt, indigo, a double oxide of cobalt and aluminum, and artificial chemical compounds. Indigo was used as a dye to colour cloth for trousers, which became known as blue jeans.
User Meng Lin
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Answer:

pigments for blue

Step-by-step explanation:

User Egil
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