Mary Lance is an award-winning filmmaker with a special interest in documenting the arts, and when she first came across indigo during a lecture in New York she was instantly intrigued.

Indigo is a vibrant blue dye laden with symbolic meaning. A commodity that was once central to international trade and colonial economies; and the reason blue jeans are blue. Filmed in Japan, Bangladesh, Nigeria, Mexico, El Salvador and the US, this fascinating documentary weaves together visually stunning stories of indigo’s cultural traditions, its history and importance in global trade, and people who are reviving indigo for sustainable development – once again making true blue.