1. a deep blue-purple color
2. a blue dye obtained from certain plants, especially those of the genus Indigofera

1. having a deep blue-purple color

Examples

• The artist mixed indigo with white to create a lighter shade.
• She wore an indigo dress to the evening party.
• Indigo was historically used to dye fabrics blue.
• The indigo sky stretched endlessly above them.
• Traditional indigo dyeing requires several steps to achieve the rich color.
• The rainbow showed bands of red, orange, yellow, green, blue, indigo, and violet.