― Can’t decide what nail color to wear today? Now you don’t have to be bothered with such major life decisions. Ruby Wing, a new line of nail polish that changes color in the sun, features some sort of magical “photochromic” technology and gives you two distinct colors in one bottle. [Ed. note: Remember hypercolor tees? [...] ∙ Continue reading »Follow Fashionista on Twitter or become a fan on Facebook. .