What is the real
Fortunately, the answer is very simple: there is no such hue as authentic Bugatti Blue, Ettore and Jean Bugatti painted their cars in various shades throughout the years, claiming the French national colour in all shades and depths as their colour for the Bugatti brand.
However, legend has it that Ettore Bugatti’s wife smoked cigarettes from a French brand whose packs were also blue. Each time a car was produced, she would allegedly hold her cigarette pack against the paintwork. If the colour of the paint did not match the colour of the packet, she insisted that car to be repainted.