Definitions
1.NounA purplish-blue color."web indigo: "
2.NounA greenish dark blue color; the color of indigo dye."indigo: "
3.NounA blue-colored dye obtained from certain plants (indigo plant or woad), or a similar synthetic dye.
4.NounAn indigo plant, such as from species in genera Indigofera, Amorpha (false indigo), Baptisia (wild indigo), and Psorothamnus and Dalea (indigo bush).
5.Adjectivehaving a deep purplish-blue colour