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Indigo is a rich color between blue and violet on the visible spectrum, it’s a dark purplish blue. Dark denim is indigo as is Indigo dye. It’s a cool, deep color and also a natural one. True Indigo dye is extracted from tropical plants as a fermented leaf solution and mixed with lye, pressed into cakes and powdered.
Natural indigo has been around since Greek and Roman times and popularized in India, China and Japan. So Indigo goes back in time, it has history, a revolt in Bengal in the 1600s was named after it. Indigo is mysterious, serious, elegant and globally appealing.