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What Color is Indigo?

One of the colors of the rainbow, indigo — a dark purplish blue — gets it name from the indigo plant used to create the indigo dye.
Indigo appears between blue and violet in a rainbow. Purple grapes and blueberries are indigo. The deep blue of dark denim blue jeans is indigo.
Indigo is a deep, purply blue with some indigos having more blue or more violet.
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