CO went for “Bill” in 1992, and it is trending all-Democrat at the state level.
1992 is hardly a normal election year. billy jeff "carried" the state with only 40% of the vote with Perot taking 23%. Without Perot, it quite likely that George H. W. would have won Colorado.
Yes, Colorado is becoming more Democratic with each election cycle but since the Republicans have carried it in the last three presidential elections, I would hesitate to color it blue yet. I would be surprised if the Republican nominee (regardless of who he is) doesn't carry Colorado in 2008.