French roundels in the slightly darker late war blue, but at a 1/3/5 ratio, ie. with a smaller centre circle. Some French factories stuck with the 1/2/3 ratio throughout the war, while others, notably SPAD, switched to the British style 1/3/5. License production meant the same aircraft type could often be seen with both styles of marking - eg. SPAD XIIIs usually had this style, but those license-built by SAFCA or Bernard had the 1/2/3 ratio.