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indigo blue

indigo (def 4).
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.
Origin of indigo blue
Related forms
indigo-blue, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for indigo blue
  • Guest rooms contain exposed brick, which makes the indigo blue colors and white deco-style lacquered furniture pop.
  • Recently killed specimens turn a bright indigo blue.
  • In late summer the leaves have died back leaving the stem upright with a cluster of indigo blue berries at the tip.
British Dictionary definitions for indigo blue

indigo blue

noun, adjective (indigo-blue when prenominal)
the full name for indigo (sense 1), indigo (sense 3)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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