Colby have ended Marown’s 100 per cent record in CFS Division Two.
An Andrew Moody goal gave the southerners victory at Glen Road to boost their promotion bid.
Marown stay top but Ayre United have moved within two points of the summit after a 4-0 home victory over Onchan.
Goals from James Teare (two), Johnny Kelly and Paul Kennish sealed a good day for the Tangerines.
Douglas Royal remain third after a 6-0 win at Malew, courtesy of a double from Dave Skillen and a goal apiece from Craig Taylor, Gavin Gawne, Jamie Carr and Craig Dolman.
FC Isle of Man and AFC Liverpool to meet in vital hunt for points
Hockey: Cup finals double-header on the cards
Rugby: Douglas to host Sandbach in big top-of-the-table clash
Football: Prem title contenders Corinthians and Peel to meet
Manx road racers open up about the importance of talking therapies