Mehreenyyy spotted a Purple Trench Coat trend on Polyvore. She says, "People are starting to get prepared for the coming autumn and winter and the bright neon colour adds some zest to their entire outfit, as well as keeping them warm. The purple trench isn't just for the Joker or Willy Wonka." Purple is a fall 2009 color trend and combined with the lightweight structure of the trench, it's no wonder it's so popular on Polyvore! The City's Whitney Port has been spotted wearing her purple trench, too.