Here's how natural indigo is still grown and fermented in Japan, despite the fashion industry's dependence on synthetic dyes.

But what color is indigo? Turns out, that's a big question. A mix of blue and purple — and affectionately known in the Livingetc office as 'blurple' — indigo sits on the color spectrum ...

Production of indigo dye was a major industry in 19th century Bengal, India. Indigo factories were sited on river valleys for the water supply, and because indigo plants (several species of ...