Blue Is the Colour was released in 1972 as Chelsea Football Club's official song, performed by the club's players ahead of that year's FA Cup final. It became a hit in Britain and a lasting part of the club's identity, sung by supporters at Stamford Bridge and quoted in matchday coverage ever since. Decades later, short clips of its chorus circulate online as a shorthand for Chelsea pride, nostalgia for 1970s football and the singalong spirit that still defines the club's fan culture.