High Quality Content by WIKIPEDIA articles! The Rainbow jersey is the distinctive jersey worn by the reigning world champion in a bicycle racing discipline. The jersey is predominantly white with five horizontal bands in the UCI colours around the chest. From the bottom up the colours are: green, yellow, black, red and blue; the same colours that appear in the rings on the Olympic flag. The tradition is applied to all disciplines, including road racing, track racing, cyclo-cross, BMX, and the disciplines within mountain biking.