Colorado sets one main number for most windows: 27% VLT, the minimum amount of visible light your tint has to let through. That single figure catches a lot of drivers off guard, since it applies the same way to every vehicle type and doesn’t get more lenient for SUVs or trucks the way some neighboring states allow. The windshield follows a different rule entirely, and the fine for getting it wrong is usually much smaller than most tint shops make it sound. Here’s what the law actually says, straight from Colorado Revised Statutes 42-4-227.
Window | Legal VLT limit | Notes |
Windshield | Non-reflective tint on the top 4 inches, or to the AS-1 line | Anything lower must meter at 70% VLT or higher |
Front side windows | More than 27% VLT | Same rule for every vehicle type, sedans and SUVs included |
Back side windows | More than 27% VLT | Unless the front windows and windshield already exceed 70% VLT |
Rear window | More than 27% VLT | Same exception applies as the back side windows |
How dark can you legally tint each window?
The 27% rule applies the same way whether you’re driving a sedan or a full-size SUV. Colorado doesn’t give larger vehicles a darker allowance the way some states do, so the front side windows on a pickup truck and a Camry both need to meet the exact same number.
The windshield doesn’t follow that percentage at all. Only the top strip, four inches down or to the AS-1 line etched into the glass, whichever gives more coverage, can carry non-reflective tint with no VLT requirement attached. Anything applied below that line has to meter at 70% VLT or higher, which rules out most aftermarket windshield tint people ask about. The rule exists for a practical reason: a windshield is the one piece of glass a driver actually needs full visibility through at all times, so the law leaves almost no room to darken it beyond that top strip.
The back window rule most drivers get wrong
Here’s the part that trips people up: back side windows and the rear window aren’t automatically allowed to go as dark as you want. They still need more than 27% VLT under the standard rule, the same as the front. The only way to legally go darker back there is if your front side windows and windshield are already above 70% VLT, meaning close to untinted. Once that condition is met, the back windows can be any darkness.
Reflective and mirrored finishes aren’t allowed on any window, and red or amber tint is prohibited outright, regardless of how dark or light it is.
What happens if your tint is too dark
How officers actually check it
Colorado State Patrol and local officers carry handheld tint meters, small devices that clamp onto the glass, shine light through from one side, and read the VLT percentage directly on the other. There’s no guessing involved on the roadside. The meter gives an exact number, which is why arguing that your tint “looks fine” doesn’t hold up against a reading below 27%.
The citation and the fine
Penalties for a tint violation in Colorado depend heavily on how far outside the limit the tint actually is. A standard tint violation is a Class B traffic infraction, a civil matter rather than a criminal charge, and the base fine typically runs somewhere between $15 and $100 plus court surcharges. That’s the outcome for most drivers who get pulled over for tint alone. The much larger figures you’ll see quoted elsewhere, $500 to $5,000, apply to the misdemeanor tier, which is reserved for excessively dark tint or repeat violations, not a first-time citation.
It’s also worth knowing that an installer carries separate liability under the same statute. Driving with illegal tint and installing tint that doesn’t meet the legal requirements are treated as two different violations, so the penalties don’t only fall on the driver.
The medical exemption myth
Many tint shops advertise a medical exemption for darker Colorado tint, and it’s simply not true. The law itself contains no exemption process, and there’s no waiver form listed anywhere on Colorado’s official DMV forms. The myth likely persists because many neighboring states do offer one, so drivers moving from elsewhere, or shops copying content from states where it’s real, end up repeating something that never applies here. If a shop tells you a doctor’s note lets you go darker than the law allows, Colorado doesn’t recognize that, and it won’t hold up at a traffic stop.
How to stay legal and still beat the heat
Staying at 27% doesn’t mean giving up heat rejection. Ceramic tint blocks a meaningful share of infrared heat even at a legal, lighter shade, so you can cut down cabin temperature without pushing past what the law allows. That’s a real advantage over dyed film, which needs to go much darker to feel a similar effect, and darker is exactly what gets flagged during a stop.
The windshield strip is worth planning around too. Since only the top four inches or the AS-1 line can legally carry non-reflective film, a lot of the heat that actually comes through the glass at eye level has nowhere legal to go except that narrow band. Combining a legal front-side shade with ceramic film on the rest of the car covers the heat without touching anything that could get flagged.
If you want legal window tinting in Centennial done to the actual VLT numbers, not just eyeballed, that’s exactly what a proper install measures before the car leaves the shop.
Ready to book?
We measure VLT before and after every install, so what goes on your car is legal from the start. Book a legal tint appointment, and we’ll match the shade to what Colorado actually allows.
Frequently asked questions
How much is a tint ticket in Colorado?
Most first-time citations fall under a Class B traffic infraction, with a base fine in the $15 to $100 range plus surcharges. Fines in the $500 to $5,000 range apply to the misdemeanor tier, which is for excessively dark tint or repeat offenses, not a typical first stop.
Does fixing illegal tint cost extra on top of the fine?
If an officer issues a fix-it order, you’ll need to have the tint removed or brought into compliance separately from whatever the citation costs. Removal and a legal re-tint are usually priced together if you have it done at the same shop.