History of Indigo in Timeline

Indigo is a color term encompassing various hues in the blue region, derived from the ancient dye of the same name. It can describe the color of the dye itself, fabrics dyed with it, a spectral color, or a region on the color wheel including shades of blue, ultramarine, and green-blue. In the web era, "indigo" has also been used to refer to certain purple and violet hues, based on its usage in HTML web page specifications. The term originally gained prominence as one of the seven colors of the rainbow defined by Isaac Newton.

1914: Indigo remains the dominant color of French military coats

In 1914, indigo remained the dominant color of French military coats.

1980: J.W.G Hunt spectrum division

In 1980, color scientist J.W.G. Hunt divided the spectrum between violet and blue at about 450 nm, without specifically naming the hue indigo.

1992: Publication of 'Indigo' novel by Marina Warner

In 1992, Marina Warner's novel 'Indigo', a retelling of Shakespeare's The Tempest featuring the production of indigo dye by Sycorax, was published.

Indigo

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1999: Crayola releases indigo crayon

In 1999, Crayola released an indigo crayon.

2001: Crayola releases iron indigo crayon

In 2001, Crayola released an iron indigo crayon.

2004: Crayola releases indigo crayon

In 2004, Crayola released an indigo crayon.

2005: Publication of 'Tropical Indigo' in Guía de coloraciones

In 2005, 'Tropical Indigo' was designated as the color called añil in the Guía de coloraciones (Guide to colorations) by Rosa Gallego and Juan Carlos Sanz.

2006: Bohren and Clothiaux spectrum division

In 2006, color scientists Bohren and Clothiaux divided the spectrum between violet and blue at about 450 nm, without specifically naming the hue indigo.