What do you mean by Indigo??

A tropical plant of the pea family, which was formerly widely cultivated as a source of dark blue dye.

Explanation:

Definition of indigo

1 : a deep reddish blue. 2 : indigo plant. 3a : a blue vat dye obtained from plants (such as indigo plants) b : the principal coloring matter C16H10N2O2 of natural indigo usually synthesized as a blue powder with a coppery luster.

Explanation:

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