Add Yahoo as a preferred source to see more of our stories on Google. We’d like to make a case for blue nail polish. From indigo to cobalt to the dreamiest sky blue, the shade, in its many variations, ...

Indigo plants have been used to dye fabric for thousands of years. Unlike other dyes, indigo does not end up chemically linked to textile fibers; rather, it adsorbs to the surface of the threads. This ...