You can do a boring old hag of a witch, or you can arrive in style perched on your broom stick so that all cat eyes are fixated on YOU! The Neuvo witch can be sultry or funky, forget the green make-up...
Purple is a great base to use, a purple net tutu with purple stripey tights. Top with a black witch hat, decorate it with lots of tulle or lace. (a veil would be nice) A black bodice, corset or tee shirt...