INDIGO a.
alled also indigotin. (b) A dark, dull blue color like the indigo of commerce. -- Indigo brown (Chem.), a brown resinous substance found in crude indigo. -- Indigo copper (Min.), covellite. -- Indigo green, a green obtained from indigo. -- Indigo plant (Bot.), a leguminous plant of several species (genus Indigofera…