Colo. Rev. Stat. § 37-45-128
It is the duty of the officer or body having authority to levy taxes within each county, city and county, or town to levy the taxes and special assessments as provided in this article, and it is the duty of all county or city and county officials charged with the duty of collecting taxes to collect such taxes and special assessments in the time, form, and manner and with like interest and penalties as county or city and county taxes are collected and, when collected, to pay the same to the district ordering its levy or collection, and the payment of such collections shall be made through the secretary of the district and paid into the depository thereof to the credit of the district. All taxes and assessments made under this article together with all interest thereon and penalties for default in payment thereof, and all costs in collecting the same, until paid, shall constitute a perpetual lien on a parity with the tax lien of general, state, county, city, town, or school taxes, and no sale of such property to enforce any general, state, county, city, town, or school tax or other liens shall extinguish the perpetual lien of such taxes and assessments.
C.R.S. § 37-45-128