Career
He currently plays for Djurgårdens IF in the Swedish premier division Allsvenskan. Gambia
Colley started out playing youth football with Wallidan F.C. who are a part of his home countrys top flight GFA League First Division. After he started playing for the first team he trialed with Major League Soccer club Sporting Kansas City on two separate occasions in 2010 and 2011.
The Americans wanted to sign Colley but refused to pay any form of transfer fee or training compensation to his Gambian club
KuPS
In January 2013 he signed a two-year contract with KuPS. During the time between his two seasons in Finland he trialed with a couple of 2. Bundesliga clubs and Arminia Bielefeld made an offer to buy Colley.
An agreement was not reached however as they could not agree on the transfer fee. As his contract with the Finnish club was nearing the end Colley was described as "perhaps our best foreign signing ever" by the KuPS club president
Djurgårdens IF
In August 2014 Colley signed three-year contract with Swedish Djurgårdens IF, starting the first of January 2015.
He played his debute game for the club the 22 February 2015 against Ängelholms FF in the Swedish Cup. In 2012 he made his debut for the senior Gambia national team