The Olympic rings were designed by Pierre De Coubertin, who also reintroduced the Games in 1896. He introduced his first draft of the rings and the flag in 1914.
He developed the logo further by giving the rings colours.
“The Olympic flag … has a white background, with five interlaced rings in the centre: blue, yellow, black, green and red … This design is symbolic ; it represents the five inhabited continents of the world, united by Olympism, while the six colours are those that appear on all the national flags of the world at the present time.”
– Pierre De Coubertin (1931) –