Both the national football team and the national rugby union team are nicknamed "''Les Bleus''" in reference to the team's shirt colour as well as the national French tricolour flag. Football is the most popular sport in France, with over 1,800,000 registered players and over 18,000 registered clubs. The football team is among the most successful in the world, with two FIFA World Cup victories in 1998 and 2018, one FIFA World Cup second place in 2006, and two UEFA European Championships in 1984 and 2000.