indigo blue

American  

noun

1. indigo.

2. Also called indigo, indigotin.  a dark-blue, water-insoluble, crystalline powder, C 16 H 10 N 2 O 2 , having a bronzelike luster, the essential coloring principle of which is contained along with other substances in the dye indigo and which can be produced synthetically.

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indigo blue British  

noun

1. the full name for indigo indigo

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Other Word Forms

• indigo-blue adjective

Etymology

Origin of indigo blue

First recorded in 1705–15

Example Sentences

Models showcased dresses in indigo blue, on a deep blue catwalk under the cavernous reinforced concrete dome of the futuristic building designed by Brazilian architect Oscar Niemeyer.

From Reuters • Sep. 25, 2023

For those that do like bolder plumbing fixtures, look for colors like indigo blue, black plum, and thunder gray.

From Seattle Times • Dec. 6, 2021

“Japanese Book” portrays a 19th-century book whose creased and worn indigo blue cover seems like a coda to Ms. Celmins’s images of night skies, waves and clouds.

From New York Times • Sep. 26, 2019

Leather skins lie on the roofs, drying in the sun and men expertly step in and out of the circular vats of dye: turmeric yellow, indigo blue and poppy red.

From The Guardian • Apr. 28, 2019

The makos were larger and had mouths bursting with frightening teeth, but they too were nicely coloured, an indigo blue that shimmered beautifully in the sun.

From "Life of Pi" by Yann Martel