Colorado constitution
Article VI
Section 15

The juvenile court of the city and county of Denver shall have such jurisdiction as shall be provided by law. The judge of the juvenile court of the city and county of Denver shall have the same qualifications and term of office as provided in this article for district judges and shall be elected initially by the qualified electors of the city and county of Denver at the general election in the year 1964. Vacancies shall be filled as provided in section 20 of this article. The number of judges of the juvenile court of the city and county of Denver may be increased as provided by law.