It’s also an iconic beauty product, period, though there are other colors that have garnered just as much notoriety for their color payoff and long-wear capabilities. Even those who’ve never stepped into a Sephora or Ulta have heard someone in their life - or Rihanna - utter the words “Ruby Woo.” Not only is it one of the most popular M.A.C shades to morph into a top-seller for the brand.