Chelsea Football Club (also known as The Blues or previously The Pensioners) are an English professional football club based in west London. Founded in 1905, they play in the Premier League and have spent most of their history in the top tier in English football. They have had two broad periods of success, one during the 1960s and early 1970s, and the second from the late 1990s to the present day. Chelsea have won three league titles, three FA Cups, four League Cups and two UEFA Cup Winners' Cups.
Chelsea's home is the 42,055 capacity Stamford Bridge football stadium in Fulham, West London, where they have played since their foundation. In 2003, the club were bought by Russian oil tycoon Roman Abramovich.
The club's traditional kit colours are royal blue shirts and shorts with white socks. Their traditional crest is a ceremonial blue lion holding a staff; a modified version of this was adopted in 2005. Chelsea are one of the best-supported clubs in the UK, with an estimated fanbase of around four million. Chelsea do not have an obvious rivalry, in the manner that Liverpool and Everton, or Arsenal and Tottenham Hotspur do. The club's nearest neighbours are Fulham, but they are not seen as big rivals by Chelsea fans, because the clubs have spent most of the last 40 years in separate divisions.
(Source – WIKIPEDIA.org)