Colo. Rev. Stat. § 19-5-201
Any child legally available for adoption as provided in section 19-5-203, under eighteen years of age, and either present in the state at the time the petition for adoption is filed or under the jurisdiction of a court in Colorado for at least six months may be adopted. Upon approval of the court, a person eighteen years of age or older and under twenty-one years of age may be adopted as a child, and all provisions of this part 2 referring to the adoption of a child shall apply to such a person.
C.R.S. § 19-5-201
This section was contained in a title that was repealed and reenacted in 1987. Provisions of this section, as it existed in 1987, are similar to those contained in 19-4-105 as said section existed in 1986, the year prior to the repeal and reenactment of this title.