White
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That's easy it has a color from every flag around the world to show peace and mutualism
The colours which ARE on the Olympic flag are Red Blue Green Yellow and Black on a White background. Any other colours than these are not on the Olympic flag.
The background color of the UN Flag is light blue.
The plain white background on the Olympic flag symbolize peace among the nations
White
There is no particular meaning to each color in the Olympic flag. The colors that are on the flag represent the colors that can be found in almost all nations of the world.
The following is quoted directly from the IOC: "The five rings represent the five continents. They are interlaced to show the universality of Olympism and the meeting of the athletes of the whole world during the Olympic Games. On the Olympic flag, the rings appear on a white background. This flag translates the idea of the universality of the Olympic Movement. At least one of the colors of the rings, including the white background, can be found on the flag of every nation in the world."Read more: What_do_the_Olympic_rings_represent
Red
its a netural colour and means peace
blue
Vietnam flag- Red background, Yellow 5 pointed star in the middle
It means peace among the nations of the world.