From Simple English Wikipedia, the free encyclopedia
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Indigo is a dye made from the so-called plant, used to dye cloth. It is also the sixth color of the rainbow, a shade lying between blue and violet.
Indigo is neither an additive primary color nor a subtractive primary one. Isaac Newton named and defined it when he divided up the optical spectrum (which is a continuum of frequencies). He specifically named seven colors primarily to match the seven notes of a Western musical scale, because he believed sound and light were physically similar. He also named them to link colors with the (known) planets, days of the week, and other lists that had seven items.
These things are the color indigo:
- grapes
- night sky
- blue berries
Indigo was also the name of a character from the famous toy line, Rainbow Brite.
