Let's talk about Charlotte Corday.

Charlotte Corday, a young lady from Normandy, was executed for the bathtub murder of Jean-Paul Marat, a Revolutionary whom she felt needed to be reined in a bit.
Red was reserved for the clothing of those who had committed patracide.  Marat was considered by some to be a father of the people.  Thus, Charlotte's red dress.  "Put your red dress on..."  Isn't that a line in a song?