I was having a hard time deciding this year as I really like to come up with something unique every Halloween and finally narrowed it down to two possibilities:
1.  The woman that gets killed at the begining of Sin City.  It is a black and white scene except for the woman's red dress and bright red lipstick.  So I am getting a short grey wig, grey face make-up and a tight fitting grey turtleneck or long sleeve shirt and gloves which I will wear a bright red dress over [ and the red liptsick  

  ]  ; and grey nylons and grey shoes.  If I can pull it off I think it will look really cool.  
2.  I have an alternate/similar idea to be a silver screen movie star, same kind of idea except all black/white/grey clothes/make-up etc.... and old fashion 40's style clothes.
Happy Halloween to all !!  
