Indigo

Indigo is a color named after the blue dye derived from the plant Indigofera tinctoria and related species. The color is placed on the electromagnetic spectrum between about 420 and 450 nm in wavelength, placing it between blue and violet. Although traditionally considered one of seven colors of the rainbow or the optical spectrum, modern color scientists do not usually recognize indigo as a separate division and generally classify wavelengths shorter than about 450 nm as violet. Optical scientists Hardy and Perrin list indigo as between 446 and 464 nm wavelength.

The first recorded use of indigo as a color name in English was in 1289.

Read more about Indigo:  History, Classification As A Spectral Color, Distinction Between Four Major Tones of Indigo, In Nature

Other articles related to "indigo":

Aram Hur - Career
... She is the chairperson of Indigo Book Company which is located in Busan, South Korea (인디고 서원) ... of nonprofit book publisher, magazine (Humanities Magazine for Youths "INDIGO+ing"), bookstore, after-school course program, and community center ... She is a founding member and chief director of Indigo Youth Book Fair ...
Anajo - Discography - Singles/EPs
... raus (Single, May 2004, Tapete Records/Indigo) Monika Tanzband (Single, April 2005, Tapete Records/Indigo) Spätsommersonne (EP, September 2006, Tapete Records/Indigo) Wenn du nur wüsstest (Single, January ...
Hypoplectrus Indigo
... Hypoplectrus indigo, also known as the Indigo Hamlet, is a species of Hamlet from the Western Central Atlantic ... Wide medium blue to indigo bars separated by narrower bars ...
Captain Indigo
... Captain Indigo (real name unspecified, designated Andrew Laurence in an issue of New Thunderbirds Comic, although not necessarily canonical) is a characters in the 1960s Supermarionation television series ... Captain Indigo is not presented in a Spectrum uniform - instead, he is dressed as a barman ... His shirt, however, is indigo ...
Indigo - In Culture - „añil"
... In rural Mexico indigo is known as „añil“, from Hispanic Arabic anníl o annír, derived from classical Arabic níl, which in turn derives from Persian nil and Sanscrit nīla ... A weatherproof version is Maya Blue, combining indigo with Palygorskite, a natural clay ...