Indigo is the sixth color of the rainbow. Depending on who you ask, it's basically blue or purple or violet. Indigo is also a plant that was farmed for its dye.

History

Indigo was invented by Big Color to sell more colors. Historians presume it could have also been made up by Roy G. Biv to justify that pesky i in his last name. For a real life example, please press control and p on your keyboard.

Colors
 
Red • Orange • Yellow • Green • Blue • Purple • Black • White • Pink • Brown • Gray (Grey)
 
Cyan • Magenta • Indigo • Violet • Rose • Gold • Silver • Bronze
 
Fuchsia • Beige • Amber • Lime • Lemon • Tan • Teal • Olive • Khaki • Sky Blue • Navy
 
Maroon • Crimson • Vermillion • Scarlet • Coral • Salmon • Peach • Cream • Lavender • Lilac • Aqua • Turquoise • Emerald • Ochre • Sienna • Umber
 
Light Gray • Dark Gray • Burgundy • Auburn • Ruby • Sepia • Taupe • Banana • Spring Green • Mint • Jade • Aquamarine • Azure • Sapphire • Amethyst • Plum • Neon • Ivory • Platinum
 
Apricot • Tangerine • Marigold • Wheat • Chartreuse • Moss • Kelly • Celadon • Periwinkle • Cerulean • Cobalt • Ultramarine • Blueberry • Iris • Grape • Thistle • Mauve • Orchid • Strawberry • Cerise • Vanilla • Chocolate • Mahogany • Chestnut • Ebony • Charcoal • Gunmetal • Key
 
Coquelicot • Persimmon • Sunburn • Peru • Goldenrod • Citrine • Vitellary • Dandelion • Pear • Mindaro • Goo • Slime Green • Sage • Asparagus • Harlequin • Erin • Malachite • Pakistan • Verdigris • Viridian • Alice Blue • Electric Blue • Capri • Cornflower • Glaucous • Victoria • Zaffre • Eggplant • Heliotrope • Puce • Mulberry • Amaranth • Snow • Pearl • Xanadu • Feldgrau
Eigengrau • Vantablack