Felix Nai, an indigo dye craftsman, is known for his inky blue hands and nails, which are a result of his work as an indigo dye craftsman. He grows and farms his own indigo plants and uses the century-old method of lye fermentation to activate micro-organisms that create the liquid indigo dye from the leaves of the plants. On Culture Club, Hongbin Jeong and Roshan Gidwani speaks to Felix Nai, Indigo Farmer, Homo Faber Guide, to share more.