People have been wearing blue jeans for centuries. Originally, the blue color came from a natural indigo dye. The dye was chosen for the way it interacted with cotton. When heated, most dyes ...

The ridges of the mortar in between the bricks emit a blue hue, the color of the ocean: indigo, a name that refers to the shrub, the dye the plant produces and the color itself. This crumbling ...

Natural indigo dye has been used worldwide for thousands of years, but the invention of synthetic indigo dye in the 1800s caused the industry to crater. In Japan's Tokushima Prefecture ...