dye, dyestuff - a usually soluble substance for staining or coloring e.g. fabrics or hair

genus Indigofera, Indigofera - genus of tropical herbs and shrubs having odd-pinnate leaves and spurred flowers in long racemes or spikes

Indigofera anil, Indigofera suffruticosa, anil - shrub of West Indies and South America that is a source of indigo dye

bush, shrub - a low woody perennial plant usually having several major branches

reddish blue, violet - a variable color that lies beyond blue in the spectrum