Count Eliot Zborowski, father of inter-war racing legend Louis Zborowski, suggested that each national entrant be allotted a different colour. The first competition in 1900 assigned: Blue to France, Yellow to Belgium, White to Germany and Red to the United States. These colors are often displayed on race cars, helmets, and racing liveries to represent the nationality or origin of the driver or team.
While not mandatory in modern motorsports, these colors continue to hold symbolic and traditional significance. The colours most likely have their origin in the national teams competing in the Gordon Bennett Cup, which was held annually in 1900-1905, and were definitely established in the 1920s and 1930s era of Grand Prix motor racing, when blue Bugatti and red Alfa Romeo dominated many races. There's a lot of countries.
The question doesn't mention F1, but since your nickname is F1Krazy it's worth mentioning that the beautiful country-based colour scheme in F1 (with some differences) lasted until 1967, the last year without sponsors in the car's livery. This mixed history and current informality has led to Germany having two national racing colors. Did you guys know that each country representing a motor sports event would sport a unique colour scheme like this: You learn something new everyday.
Here Every colour car is a sports car. From a Maruti to a Mercerdez, if its on the road, its a racing car. Everyone's in a hurry to reach their destination.
What about India? Discover the history and significance of national racing colors in motorsport, showcasing their evolution and impact on car racing traditions. These were often quite different from the national colours used in other sports or in politics. about List Of International Auto Racing Colors: History, Contemporary Usage.
However, if you are struggling for inspiration, a great place to start is the national identity of the car itself, and many of the countries with the biggest car modding scenes have national motor racing colours.