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

Indigo blue drapes circled the room; in the center was a huge circular table with a smoky blue base and cover.

From Time Magazine Archive

Indigo blue equally, of course, in three shades of very dark and light.

From Hand-Loom Weaving A Manual for School and Home by Todd, Mattie Phipps

Indigo blue; wings and tail blackish; female brown; in flocks; often feeds in the grass; noteworthy song.

From Wild Birds in City Parks Being hints on identifying 145 birds, prepared primarily for the spring migration in Lincoln Park, Chicago by Walter, Alice Hall

Indigo blue is also made from artificial amido cinnamic acid, and from artificial isatine; and these methods are of great commercial importance.

From The Gutenberg Webster's Unabridged Dictionary Section I, J, K, and L by Project Gutenberg

Indigo blue, and the red used in dyeing what is called Turkey red, are reliable in application to both wool and cotton, and are water and sun proof as well.

From How to make rugs by Wheeler, Candace