Hello, the five colors of the Olympic Rings represent the continents:
1. Yellow = Asia
2. Blue = Europe
3. Green = Oceania
4. Red = Americas
5. Black = Africa
The five Olympic rings were designed in 1913 by Pierre de Coubertin, former President of the International Olympic Committee and founder of the modern Olympic Games, and were chosen because they encapsulated the colors of the flags of the Member States, but more connotations have since been given to the five rings. 1979, the Olympic Review, published by the IOC, stated that: the five rings symbolize the unity of the five continents, and that athletes from all over the world compete with fairness, frankness, and friendship. The five rings symbolize the unity of the five continents, where athletes from all over the world meet at the Olympic Games in a spirit of fairness, frank play and friendship.
Official Olympic website