Kemp went 3-for-4 in the game and Shane Victorino also had three hits and scored a trio of runs for the Dodgers, who wrapped up a 4-5 homestand and remained 1 1/2 games behind first-place San Francisco in the National League West.
Chad Billingsley (8-9) allowed four runs on seven hits and struck out five over 6 1/3 innings while winning his fourth consecutive start.
Colorado's D.J. LeMahieu drove in a score-tying run with a single in the fourth inning. Eric Young led off the game with an inside the park home run.