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A mile closer to the sun, Colorado UV is brutal on interiors and paint alike. The state allows 27% all around — darker than its neighbors — but note there is no medical exemption here, so the printed number is the law.
Reviewed July 2026 · Passenger cars (sedans)
| Glass | Rule for passenger cars |
|---|---|
| Windshield | Non-reflective tint on the top 4 inches only. |
| Front side windows | 27% VLT or lighter |
| Back side windows | 27% VLT or lighter |
| Rear window | 27% VLT or lighter |
| Reflectivity | No metallic or mirrored appearance. |
| Medical exemption | Not offered |
VLT — Visible Light Transmission — is the percentage of outside light that makes it through your glass. The number printed in the law is a floor: film may be that bright or brighter. Because factory glass already blocks a little light, an officer's meter reads the combined darkness of glass plus film. A film sold as "27%" on top of factory glass can meter a few points darker — which is why professional installers measure the final result, not the box label.
Quality matters as much as darkness. Dyed films fade purple and bubble; ceramic films like ULTRASHIELD SHADOW reject heat and up to 99% of UV at any legal darkness, with no signal interference — so you get the comfort without gambling on the number.
Certified shops that install to your state's exact legal limit and register your warranty with CARFAX.
This page summarizes Colorado statute as published and was last reviewed July 2026. It is not legal advice. Laws change and local enforcement varies — confirm current rules with the Colorado DMV before tinting.
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