Is it true that the six colors of the Olympic flag are those that appear on all the national flags of the world?

Yes, it is true that the six colors of the Olympic flag—blue, yellow, black, green, and red, along with the white background—were chosen because at least one of these colors appears in every national flag in the world. The design symbolizes unity among nations through sport. The use of these colors was intended to represent the inclusivity of the Olympic Games.