Colorado Window Tinting Law

Read the Colorado Window Tinting law. Extreme Autoworks is the premier auto window tint specialist in Lakewood, Littleton, Arvada, and the rest of the Denver metro area. Learn more about us!

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Colorado Window Tinting Law Enacted: 1995


Darkness of tint is measured by Visible Light Transmission percentage (VLT%). In Colorado, this percentage refers to percentage of visible light allowed in through the combination of film and the window.

Windshield – Non-reflective tint is allowed on the top 4 inches of the windshield.

Front Side Windows – Must allow more than 27% of light in.

Back Side Windows – Must allow more than 27% of light in.

Rear Window – Must allow more than 27% of light in.


Similar to sunglass lenses, some tinting film contain metallic elements that help in reflecting incoming light and reducing the glare and heat generated by visible light.

Front Side Windows – No metallic or mirrored appearance.

Back Side Windows – No metallic or mirrored appearance.


Restricted Colors – The tint color(s) of RED AMBER are not legal by state law.

Side Mirrors – Dual side mirrors are required if back window is tinted.

Certificate Requirements – Manufacturers of film do NOT need to certify the film they sell in the state.

Sticker Requirements – State law recommends but does not require stickers to identify legal tinting.

Medical Exemption – N/A

42-4-227. Windows unobstructed – certain materials prohibited – windshield wiper requirements.

(1) (a) Except as provided in this paragraph (a), no person shall operate any motor vehicle registered in Colorado on which any window, except the windshield, is composed of, covered by, or treated with any material or component which presents an opaque, nontransparent, or metallic or mirrored appearance in such a way that it allows less than twenty-seven percent light transmittance. The windshield shall allow seventy percent light transmittance. The provisions of this paragraph (a) shall not apply to the windows to the rear of the driver, including the rear window, on any motor vehicle; however, if such windows allow less than twenty-seven percent light transmittance, then the front side windows and the windshield on such vehicles shall allow seventy percent light transmittance.

(b) Notwithstanding any provision of paragraph (a) of this subsection (1), nontransparent material may be applied, installed, or affixed to the topmost portion of the windshield subject to the following:

(I) The bottom edge of the material extends no more than four inches measured from the top of the windshield down;

(II) The material is not red or amber in color, nor does it affect perception of primary colors or otherwise distort vision or contain lettering that distorts or obstructs vision;

(III) The material does not reflect sunlight or headlight glare into the eyes of occupants of oncoming or preceding vehicles to any greater extent than the windshield without the material.

(c) Nothing in this subsection (1) shall be construed to prevent the use of any window which is composed of, covered by, or treated with any material or component in a manner approved by federal statute or regulation if such window was included as a component part of a vehicle at the time of the vehicle manufacture, or the replacement of any such window by such covering which meets such guidelines.

(d) No material shall be used on any window in the motor vehicle that presents a metallic or mirrored appearance.

(e) Nothing in this subsection (1) shall be construed to deny or prevent the use of certificates or other papers which do not obstruct the view of the driver and which may be required by law to be displayed.

(2) The windshield on every motor vehicle shall be equipped with a device for cleaning rain, snow, or other moisture from the windshield, which device shall be so constructed as to be controlled or operated by the driver of the vehicle.

(3) (a) Except as provided in paragraph (b) of this subsection (3), any person who violates any provision of this section commits a class B traffic infraction.

(b) Any person who installs, covers, or treats a windshield or window so that the windshield or window does not meet the requirements of paragraph (a) of subsection (1) of this section is guilty of a misdemeanor and shall be punished by a fine of not less than five hundred dollars nor more than five thousand dollars.

(4) This section shall apply to all motor vehicles; except that subsection (2) of this section shall not apply to low-speed electric vehicles.

Source: L. 94: Entire title amended with relocations, p. 2261, § 1, effective January 1, 1995. L. 95: (3) amended, p. 952, § 6, effective May 25. L. 2009: (4) amended, (SB 09-075), ch. 418, p. 2324, § 13, effective August 5.

Editor’s note: (1) This section was formerly numbered as § 42-4-224 and the former § 42-4-227 was relocated to § 42-4-230.

(2) Subsection (4) was amended in a 2009 act that was passed without a safety clause. The act, or portions thereof, may not take effect if the people exercise their right to petition under article V, section 1 (3) of the state constitution. For further explanation concerning the effective date, see page ix of this volume.


C.J.S. See 60A C.J.S., Motor Vehicles, §§ 530, 531.

Read the Colorado Window Tinting Law. Extreme Autoworks does good window tint.