bueno buscando el tema de los colores nacionales he encontrado esto
I don't plan a definitive study of it, but I believe there was a conscious effort to bring continuity to racing, as if the war hadn't occurred and order and stability had been restored to war-ravaged Europe. How quickly one's country reintroduced itself to motorsports was seen as a sign of how well it was doing. Just as interest in the Olympics reemerged as a sort of non-violent "battlefield" for nationalism, so did the idea of national identity in motorsports. National paint schemes for Grand Prix cars was a casual thing in the early twenties but became increasingly formalized in the super- nationalistic thirties: silver for Germany, red for Italy, British Racing Green for GB, white with blue stripe for America, Bugatti blue for France, etc. Whereas in the late thirties motorsports had become but one arena for increasingly bellicose nationalism, after the war it was hoped that such rivalries could remain there. Like some Wagnerian mythic vision, however, the concept required heroes and villains. So post-war motorsports journalism became one-part history, one-part myth, and one-part present day events viewed in light of that history and myth. An Alberto Ascari was compared to a Tazio Nuvolari, Mike Hawthorn to Dick Seaman, and so on. Cars wore exclusively the colors of their country without advertising. The return of Mercedes-Benz to motorsports prominence in the mid-50's was seen as a sign of the reemergence of the entire nation of Germany. America had won the war and was prosperous and unharmed, traditionally isolationist, so we really didn't care much.
The bottom line, though, is that the international racing colors of Formula 1 meant a great deal to a lot of fans. While racing colors were originally a way for fans to follow the nationality of various racing teams, the symbolism remains both a patriotic statement and an appeal to racing heritage. As an American seeing my first Grand Prix, the colors were the thing I responded to immediately, if only because they helped me pick out my racing heroes. I believe to the European fan, as mentioned above, they meant much more.
Interestingly, psychological testing by the color institutes commissioned by automakers to advise them on selecting car colors for upcoming model years bear this observation out. Most people tested think the sports cars of different countries look best in the traditional national racing colors that were required in Grand Prix and sports car races from about 1906 until the '70s before corporate sponsors' colors took precedence. For example, an Italian Racing Red Ferrari is almost a cliché, as is a silver Mercedes-Benz, a British Racing Green Jaguar and a French Racing Blue Peugeot. Maybe it can't be explained rationally, but to most observers, neither a Ferrari nor a Porsche look right in French Racing Blue, for example, while a Delahaye looks right in nothing else.
si, empezo por el orgullo nacional y acabo siendo una manera de identificar los coches
aqui hay algo sobre el british racing green
http://en.wikipedia.org/wiki/British_racing_green