Indigo dye

Indigo dye is an organic compound with a distinctive blue color. Indigo is a natural dye obtained from the leaves of some plants of the Indigofera genus, in particular Indigofera tinctoria. Dye-bearing Indigofera plants were once common throughout the world.

Blue colorants are relatively rare.
Since indigo is insoluble, it is also referred to as a pigment.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

TODYE

The craft of color — fabric dyeing, natural dyes, and the calculators behind every batch.

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