The Colorado Constitution with regards to militias:
Article 17
Militia
Section 1. Persons subject to service. The militia of the state shall consist of all able-bodied male residents of the state between the ages of eighteen and forty-five years; except, such persons as may be exempted by the laws of the United States, or of the state.
Section 2. Organization / equipment / discipline. The organization, equipment and discipline of the militia shall conform as nearly as practicable, to the regulations for the government of the armies of the United States.
Section 3. Officers - how chosen. The governor shall appoint all general, field and staff officers and commission them. Each company shall elect its own officers, who shall be commissioned by the governor; but if any company shall fail to elect such officers within the time prescribed by law, they may be appointed by the governor.
Section 4. Armories. The general assembly shall provide for the safekeeping of the public arms, military records, relics and banners of the state.
Section 5. Exemption in time of peace. No person having conscientious scruples against bearing arms, shall be compelled to do militia duty in time of peace; provided, such person shall pay an equivalent for such exemption.
That doesn't seen like much of a problem for Hillary.