I think you are good to go in CO as long as you at least have your registration.

https://www.colorado.gov/pacific/dmv/titles-faqs

I am new to Colorado. What do I need to register and title my vehicle?
Once you have established residency in your county take the out-of-state title or registration for the vehicle that is not more than 6 months expired, driver license, proof of Colorado insurance, and VIN verification. If your county requires a current Colorado emissions test, Proof of Emissions test must be included also.