Galaxy has won five and drawn two of its last seven matches and moved two points behind Real Salt Lake for second place in the Western Conference with three games remaining.
Jaime Castrillon scored his eighth goal of the year in the 16th minute for the Rapids, who have won only once in their last 15 games.
Los Angeles pressured Rapids goalkeeper Matt Pickens early and it paid off quickly. Robbie Keane had his shot blocked by defenders, but the ball rebounded to Sarvas, who sent a low drive past Pickens' right hand.
Landon Donovan and Sarvas combined to set up Keane in front of an open goal in the 13th minute, but Keane fell and never got to the ball.
Colorado equalized when Castrillon took a pass from Hunter Freeman and beat Galaxy goalkeeper Josh Saunders from 20 yards.
Donovan had a goal disallowed in the 29th minute after he leaped over Freeman and put the ball past Pickens.
Neither team threatened in the second half until Drew Moor's header for the Rapids in the 80th minute. Moor took a corner from Martin Rivero in the area, but his header sailed over the crossbar.
"The game was there to be won and we didn't win it,'' Colorado midfielder Jeff Larentowicz said. "Now we are faced with the prospects that we have to win every game'' to qualify for the playoffs.
On Friday, Sporting Kansas City beat Chicago 2-0 and in results Saturday: New York had a 4-1 win over Toronto, Columbus beat Philadelphia 3-2, Houston beat New England 2-0 and Real Salt Lake thrashed Chivas USA 4-0.
Vancouver and Seattle settled for a scoreless draw, while Portland held D.C. United to a 1-1 draw and San Jose had a 3-3 draw with FC Dallas.
Read more: http://sportsillustrated.cnn.com/2012/soccer/10/01/mls-roundup-sunday.ap/index.html#ixzz2830r6IqR
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