Each Olympic ring symbolizes one of the inhabited continents, and the colors red, yellow, blue, black and green include at least one color from the flag of every competing country. The yellow ring alone has no individual symbolism.
Pierre de Coubertin, considered the father of the modern Olympics, designed the five-ring Olympic symbol in 1914. A ring on its own represents human continuity, and the interconnected rings represent growing friendship between the inhabitants of the five continents through Olympic competition. The symbol adorns the official Olympic flag, which was first used during the 1920 Olympic games. The five-ring symbol, and the older symbol of the Olympic torch from the ancient Greek Olympic games, are the most recognized representations of the Olympics.