The tradition of the cycle race leader wearing a yellow jersey began in 1919, at the Tour de France. Journalists wanted to be able to spot the leading rider more easily. Therefore, Tour de France Director Henri Desgrange decided to hand out a yellow jersey.
Why yellow? Some say it is because the Tour’s sponsor, a newspaper called L’ Auto, was printed on yellow paper. Others say it is because post-war shortages meant yellow was the only colour of jersey available. Whatever be the reason, canary yellow now instantly stands for success, at least in the cycling world.