Colo. Rev. Stat. § 14-15-102
The general assembly declares that the public policy of this state, as set forth in section 31 of article II of the state constitution, recognizes only the union of one man and one woman as a marriage. The general assembly declares that the purpose of this article is to provide eligible couples the opportunity to obtain the benefits, protections, and responsibilities afforded by Colorado law to spouses consistent with the principles of equality under law and religious freedom embodied in both the United States constitution and the constitution of this state. The general assembly declares that a second purpose of the act is to protect individuals who are or may become partners in a civil union against discrimination in employment, housing, and in places of public accommodation. The general assembly further finds that the general assembly, in the exercise of its plenary power, has the authority to define other arrangements, such as a civil union between two unmarried persons regardless of their gender, and to set forth in statute any state-level benefits, rights, and protections to which a couple is entitled by virtue of entering into a civil union. The general assembly finds that the "Colorado Civil Union Act" does not alter the public policy of this state, which recognizes only the union of one man and one woman as a marriage. The general assembly also declares that a third purpose in enacting the "Colorado Civil Union Act" is to state that Colorado courts may offer same-sex couples the equal protection of the law and to give full faith and credit to recognize relationships legally created in other jurisdictions that are similar to civil unions created by this article and that are not otherwise recognized pursuant to Colorado law.
C.R.S. § 14-15-102
For the validity or recognition of marriages in this state, see section 31 of article II of the state constitution.