Colbert scored nine of his team-high 20 points in the final minutes to seal the victory.
The Bobcats (3-5) were 24 of 53 from the field (45.3 percent) and connected on 6 of 18 shots from distance and was 14 of 17 from the free throw line. Eric Norman scored 15 points for Montana State, with Michael Dison and Danny Robison adding 11 and 10 points, respectively.
Marcel Davis tossed in 17 points to lead the Wolverines, who were 23 of 51 from the field and just 2 of 12 from three-point range. Brenden Evans added 10 points and Mitch Bruneel pulled down nine rebounds for Utah State (3-4).