The tricolour flag is derived from the cockade of France used during the French Revolution. These were circular rosette-like emblems attached to the hat. Camille Desmoulins asked his followers to wear green cockades on 12 July 1789. The Paris militia, formed on 13 July, adopted a blue and red cockade. Blue and red are the traditional colours of Paris, and they are used on the city's coat of arms. Cockades with various colour schemes were used during the storming of the Bastille on 14 July. The blue and red cockade was presented to King Louis XVI at the Hôtel de Ville on 17 July. Lafayette argued for the addition of a white stripe to "nationalise" the design. On 27 July, a tricolour cockade was adopted as part of the uniform of the National Guard, the national police force that succeeded the militia.