WordNet sense 1 (a blue dye obtained from plants or made synthetically):

anil, indigotin

WordNet sense 2 (deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye):

Indigofera tinctoria, indigo plant

WordNet sense 3 (having color or a certain color; sometimes used in combination):

colored, colorful, coloured