The five different colored rings are the symbols of the five continents.
The five rings are the emblem of the Olympic Games, conceived and designed by Mr. Pierre de Coubertin in 1913, and determined by the Olympic Charter, also known as the Olympic five rings logo, which is the most widely recognized symbol of the Olympic Games in the world. It consists of five Olympic rings socketed in five colors: blue, yellow, black, green and red. The rings are snapped to each other from left to right, with the blue, black and red rings on top and the yellow and green rings below.
Expanded:
Regulations for the protection of the Five Rings: the Olympic Charter stipulates that the Olympic symbol is the symbol of the Olympic Movement and is the exclusive emblem of the IOC, and that, without the permission of the IOC, it may not be used by any group or individual for advertising or other commercial activities without the permission of the IOC. The IOC also requires all countries to take necessary measures to protect the Olympic Symbol in order to ensure the authority of the Olympic Movement and to avoid the misuse of the Olympic Symbol.