Dayton took a 74-71 lead with 1:44 to go on a basket by Ibi Watson but then gave up three straight points. The Flyers didn’t lead again until the go-ahead layup by Crutcher, who led the team with 19 points.
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Toppin scored 17 points. Rodney Chatman had 12 points.
Former Dayton recruit McKinley Wright with 29 points on 10-of-22 shooting. Schwartz made 5 of 7 3-pointers.
The Flyers shot 50 percent, while the Buffaloes shot 40 percent. Colorado outscored Dayton 17-5 at the free-throw line.
Postgame press conference: Dayton falls to Colorado
Chatman hit a short jump shot in the final seconds of the first half, giving the Flyers a 36-32 halftime lead.
Chatman led the Flyers with 12 points in the half, making 5 of 8 field goals. Ibi Watson scored seven. Toppin had six.
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Dayton led from the start after opening the game with a 19-5 run in the first six minutes. The Buffaloes answered with a 14-2 run in the next six minutes.
Wright, who signed with Dayton but changed his mind when Archie Miller left for Indiana, led Colorado with 11 points on 4-of-8 shooting. Dayton fans booed him every time he touched the ball in the opening minutes.
Dayton shot 57.1 percent and made 4 of 9 3-pointers Colorado shot 42.9 percent and made 3 of 11 3-pointers but grabbed six offensive rebounds and scored eight second-chance points. Colorado outscored Dayton 5-0 at the free-throw line.
NOTES: Dayton forward Chase Johnson missed his third straight game with an illness. He did not travel with the team to Chicago.