The Uruguayan scored an eye-pleasing goal and the Rapids held out after Robbie Keane shanked a penalty kick.
Colorado went ahead in the 20th minute. A cross found Vicente Sanchez in the wide area of the penalty box, and he chipped Jaime Penedo with a perfectly picked shot.
Los Angeles wasted a penalty in the second half. Drew Moor took out Rob Friend in the box and a kick was awarded, but Robbie Keane's effort was poor and went wide right.
Colorado is now 4-2-2 on the year, while the Galaxy fall to 2-2-2.