Rainbow A.C.  NBP Rainbow AC is a football club based in Kolkata, West Bengal. They play in the Officer's Choice Blue Kolkata Premier League for second time. In 2018 they are competing in the I-League 2nd Division. The team was founded in 1956 as Baranagore Rainbow Club, then later renamed to NBP Rainbow AC . The team has not been as successful as their city rivals, East Bengal Club and Mohun Bagan.