According to the Denver Business Journal:

A spokeswoman for Aetna confirmed Monday that the insurer will no longer sell new individual-market health insurance policies in Colorado and will terminate current policies held by state residents no later than July 31, 2012.

Aetna had already announced that it will no longer sell child-only coverage or small-group coverage in the state.   Colorado is one of 34 states where insurers fled the market for child-only coverage as a result of ObamaCare.  Colorado took steps to try to stabilize its child-only market, and is considering requiring insurers to sell child-only coverage as a condition of selling coverage directly to adults.

Aetna isn’t commenting on whether ObamaCare played a role in its decision.   Aetna customers will have to switch plans by July 31, 2012.