Which of the following colors isn't found on the Olympic flag?
Considering black, yellow, green and purple, the answer is: purple.
The Olympic flag consists of a white banner with five rings, one each that is blue, yellow, black, green, and red. The colors were chosen because they incorporated the colors of all national flags in existence at the time the Olympic flag made its debut, in 1914.
The flag represents the International Olympic Committee, or IOC. This is the committee responsible for organizing the Summer and Winter Olympics, and was founded back in 1894 for the first modern Olympic games. The Olympic flag, now widely-associated with the event, was first flown in 1920 at the Antwerp Summer games.
The Olympic motto is "Citius, Altius, Fortius," which is Latin for "faster, higher, stronger." Creator of the IOC Pierre de Coubertin introduced this motto in 1894 when the committee was created. Coubertin is also responsible for the design of the Olympic flag – according to Coubertin, the colors of the rings together with the white of the background included every color that composed a nation's flag at the time. Upon its initial introduction, Coubertin stated the following in the August 1913 edition of Olympique:
... the six colours [including the flag's white background] combined in this way reproduce the colours of every country without exception. The blue and yellow of Sweden, the blue and white of Greece, the tricolour flags of France, United Kingdom, the United States, Germany, Belgium, Italy and Hungary, and the yellow and red of Spain are included, as are the innovative flags of Brazil and Australia, and those of ancient Japan and modern China. This, truly, is an international emblem.
In 1936, the flag grew in popularity as an emblem of the games. Since then it has remained a quintessential part of Olympic competition.
Check out some footage of the flag from past and contemporary times below.