King totaled a game-high 26 points for Colorado, which recorded its first road win of the season after five losses, including three in Pac-12 play.
The Buffaloes (11-7, 3-3 Pac-12) previously won all their home conference games (two) and lost all their conference road contests (three).
The home loss for UCLA (13-5, 4-2) was just its second of the season in 11 outings.
After Colorado, which led by as many as 17 in the first half, extended a 10-point halftime advantage to 55-41 with 9:17 to go, Thomas Welsh single-handedly shot UCLA back into the game.
The 7-foot senior center scored 10 consecutive points, six on a pair of 3-pointers, to cut the Bruins' deficit to four with 5:20 remaining.
After a timeout, Wright and King combined for their five rally-busting points, and the Bruins never got closer than seven the rest of the way.
King's 26-point total came on 7-for-12 shooting. The 6-foot-6 senior made six of his 10 3-point attempts and led all rebounders with 10.
Wright totaled nine points, while Tyler Bey had seven points and seven rebounds for the Buffaloes, who were coming off a 70-58 loss at USC on Wednesday.
Welsh made nine of his 10 shots en route to a team-high 20 points for the Bruins, who entered the game having won six of their last seven games, including a 83-64 home victory over Utah on Thursday.
Kris Wilkes and Aaron Holiday added 10 points apiece for UCLA, which shot just 5-for-25 on 3-pointers.
Colorado, meanwhile, shot 11-for-22 on treys.
King had 11 points, including his first three 3-pointers, while the Buffaloes ran out to a 34-17 lead with 3:21 remaining in the first half.
--Field Level Media
Colorado | UCLA | |
George King 26 | Scoring | Thomas Welsh 20 |
McKinley Wright IV 7 | Assists | Aaron Holiday 4 |
George King 10 | Rebounds | Kris Wilkes 9 |
George King 6 | Free Throws Made | Kris Wilkes 3 |
George King 2 | Steals | Jaylen Hands 3 |
George King 3 | Blocks | Aaron Holiday 1 |