Confused about why I was just pulled over...

[cstone]

Caveat: I am not a Colorado Peace Officer

With that said, here is what I can provide:

From TITLE 10. INSURANCE
PROPERTY AND CASUALTY INSURANCE
ARTICLE 4.PROPERTY AND CASUALTY INSURANCE
PART 6. AUTOMOBILE INSURANCE POLICY - REGULATIONS

C.R.S. 10-4-604.5 (2014)

10-4-604.5. Issuance or renewal of insurance policies - proof of insurance provided by certificate, card, or other media
The insurance identification card may be provided in either paper or electronic format. Acceptable electronic formats include display of electronic images on a cellular phone or any other type of portable electronic device.

The charge normally listed on the summons is:

C.R.S. 42-4-1409 (2014)

42-4-1409. Compulsory insurance - penalty - legislative intent

(3) (a) When an accident occurs, or when requested to do so following any lawful traffic contact or during any traffic investigation by a peace officer, an owner or operator of a motor vehicle or low-power scooter shall present to the requesting officer immediate evidence of a complying policy or certificate of self-insurance in full force and effect as required by law.

(b) As used in this section, "evidence of a complying policy or certificate of self-insurance in full force and effect" includes the presentation of such a policy or certificate upon a cell phone or other electronic device.

(6) A person charged with violating subsection (1), (2), or (3) of this section shall not be convicted if the person produces in court a bona fide complying policy or certificate of self-insurance that was in full force and effect as required by law at the time of the alleged violation. The court clerk's office may dismiss the charge if it verifies that the person had a valid policy in effect at the time of the alleged violation using the uninsured motorist identification database created in section 42-7-602.