The six colors, including the white background, represent the colors of all the world's flags ... this is a true international emblem.
Pierre de CoubertinThe 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 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