Electric indigo | Wikipedia audio article
Channel: wikipedia tts
Date: 28/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Indigo


00:00:42 1 History
00:02:09 2 Classification as a spectral color
00:06:08 3 Distinction among the four major tones of indigo
00:07:33 3.1 Electric indigo
00:08:13 3.2 Deep indigo (web color blue-violet)
00:08:38 3.3 Web color indigo
00:10:12 3.4 Tropical indigo
00:10:40 3.5 Indigo dye
00:10:53 3.6 Imperial blue
00:11:02 4 In nature
00:11:48 5 In culture
00:12:10 5.1 Business
00:12:51 5.2 Computer graphics
00:13:12 5.3 Dyes
00:13:53 5.4 Food
00:14:29 5.5 Military
00:15:10 5.6 Spirituality
00:16:20 6 See also



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SUMMARY
=======
Indigo is a deep and rich color close to the color wheel blue (a primary color in the RGB color space), as well as to some variants of ultramarine. It is traditionally regarded as a color in the visible spectrum, as well as one of the seven colors of the rainbow: the color between violet and blue; however, sources differ as to its actual position in the electromagnetic spectrum.
The color indigo is named after the indigo dye derived from the plant Indigofera tinctoria and related species.
The first known recorded use of indigo as a color name in English was in 1289.