The main rule: a Parisian does not follow fashion, but feels it and rethinks. And therefore it knows how to turn any direction in its favor. And French women love to break the rules. Drive and freedom, not bourgeois stiffness - that’s their motto!
Do you suppose to wear an evening dress in tandem with simple sandals and a pencil skirt with ballet shoes, and not a high heel - a bad man? Not at all! It is as Parisian as choosing black for a social party.