After 1789, fashion drastically changed in France. Clothing was always a staple of class, and wealth. Clothing was also used symbolically. For example, in July 1789, the government of the city of Paris decided that citizens must wear red, white and blue for Nationialistic reasons. The red and blue symbolized the city of Paris, and the white stood for the monarchy. Over time, the French flags colors stood for liberty, equality and fraternity. The red and blue today are still time-honored to symbolize the historic city of Paris, while the white is a color for Royalty/Monarchy.
Check out this link to this era’s fashion in France: