Colorado Window Tint Laws (2026): Complete Legal Guide for Drivers

Colorado Window Tint Laws (2026): Complete Legal Guide for Drivers

Quick answer

Colorado law requires at least 27% VLT (Visible Light Transmission) on all side windows and the rear window, and 70% VLT on the windshield with non-reflective tint allowed only on the top 4 inches. Mirrored, metallic, red, and amber tints are illegal. Colorado does not recognize medical exemptions for darker tint. Violations are Class B traffic infractions with fines ranging from $500 to $5,000.

Colorado window tint limits at a glance

WindowLegal LimitWindshield (top 4 inches above AS-1 line)Non-reflective tint allowedWindshield (below AS-1 line)70% VLT minimumFront side windows27% VLT minimumBack side windows27% VLT minimumRear window27% VLT minimumReflectivityNo metallic or mirrored finishColorsRed and amber prohibited

These rules are set by Colorado Revised Statutes section 42-4-227 and apply to passenger vehicles registered in Colorado. SUVs and vans follow the same limits as sedans (Colorado does not have separate, more lenient rules for larger vehicles like some other states do).

What VLT actually means

VLT stands for Visible Light Transmission — the percentage of visible light that passes through a window after the tint film is applied. The number measures the combined effect of your factory glass and the film, not the film alone.

A few examples to make this concrete:

• 5% VLT ("limo tint") allows only 5% of light through — extremely dark
• 20% VLT allows 20% of light through — common dark tint, illegal on Colorado side windows
• 27% VLT is Colorado's legal minimum for side windows
• 35% VLT is a common legal choice — noticeable tint with full compliance
• 50% VLT is light tint, mostly chosen for heat rejection over privacy
• 70% VLT is nearly invisible — what's required across most of the windshield

A common misconception: "I want 20% tint" doesn't necessarily mean illegal. Some films are sold as 20% but, when combined with factory glass that already blocks some light, end up at 27% or higher VLT measured. That's why getting your tint installed by a shop with a calibrated VLT meter matters — they can tell you the actual combined VLT before you commit.

Front side windows: 27% VLT minimum

Your driver and front passenger windows must allow at least 27% of light through. This is the most enforced rule in Colorado tint law because front side windows are what officers see first during a traffic stop.

Most factory glass on its own measures somewhere between 70–80% VLT. To stay legal, you need to choose a film that, combined with that glass, results in 27% or more.

In practice, that usually means:

• 35% VLT film lands at roughly 28–32% combined VLT — typically legal, but cutting close
• 50% VLT film lands at roughly 40–45% combined — comfortably legal
• 70% VLT film (clear ceramic) lands at roughly 60–65% combined — nearly invisible but blocks heat and UV

If you want darker than 35% film on your front windows, you're almost certainly in illegal territory.

Back side windows and rear window: 27% VLT minimum (with one major exception)

Same 27% VLT minimum applies to the rear-of-driver windows and the rear window — unless you qualify for the 70% exception below.

This is where Colorado law differs from many other states. States like Florida, Texas, and Arizona allow significantly darker tint on rear windows. Colorado does not, by default.

The 70% VLT exception: If your front side windows and windshield both transmit at least 70% VLT (in other words, you have very light or no tint up front), you can legally tint your rear side windows and rear window to any darkness — even 5% limo tint.

This exception is rarely used because most drivers want at least some tint up front, but it's relevant for drivers who prioritize rear privacy (parents, ride-share drivers, anyone hauling valuables in the back).

Windshield: AS-1 line and the 70% rule

Windshield tinting is the most misunderstood area of Colorado law. Here's what's actually allowed:

Above the AS-1 line: Non-reflective tint of any darkness is allowed. The AS-1 line is a small marking on the upper portion of most windshields, typically 4–5 inches from the top. Tint above this line is generally a "visor strip" that blocks sun glare without affecting most of your view.

Below the AS-1 line: Tint must allow at least 70% of light through. In practice, traditional dark film fails this requirement. However, clear or near-clear ceramic films are legal across the entire windshield because they block heat and UV without reducing visible light significantly.

This is one of the biggest gaps in what Colorado drivers actually know. Many people think windshield tint is illegal in Colorado entirely. It's not — you just can't put dark film below the AS-1 line. Premium ceramic films (3M Crystalline, for example) can reject 60%+ of solar heat while staying above 70% VLT, making them fully legal on the windshield.

For drivers who do long highway commutes or regular mountain trips on I-70, a clear ceramic windshield film is one of the highest-impact upgrades you can make to your vehicle — fully legal, dramatically more comfortable, and protective against UV.

Reflectivity: no mirrors, no metallics

Colorado law specifically prohibits window tint with a metallic or mirrored appearance. This rule exists because reflective tint can blind oncoming drivers and interfere with law enforcement's ability to see into a vehicle.

What this means in practice:

• First-generation metallic films (mostly off the market now) are illegal
• Modern non-metallic ceramic films are fine — they don't have the mirror problem
• Chrome wraps on windows are illegal
• Highly reflective dyed films can be borderline depending on the exact reflectivity

When in doubt: if the tint looks like a mirror from the outside, it's probably illegal in Colorado.

Color restrictions: no red, no amber

Red and amber tint colors are prohibited. The reason is safety: red and amber tints can be confused with brake lights, turn signals, or emergency vehicle lighting from a distance.

This rule applies to any window — you cannot legally have red, amber, or yellow tint on side windows, rear windows, or windshield. Black, gray, charcoal, bronze, blue, and green tints are all permitted (though the VLT rules still apply regardless of color).

Other Colorado tint rules drivers miss

A few less-known but important rules:

Dual side mirrors required if rear window is tinted. If you tint your rear window dark enough to obstruct rear visibility, Colorado requires functional side mirrors on both sides of the vehicle. Most modern vehicles already have these, but it's worth knowing — driving a rear-tinted vehicle with a missing or broken side mirror is a separate citation.

Manufacturer certification not required. Some states require tint film to carry a manufacturer's certification before it can be sold or installed. Colorado does not. This means low-quality, off-brand films are legal to install — but they're often not legal to drive with because they fall below the 27% VLT threshold.

Stickers recommended, not required. Colorado law recommends placing a small sticker on tinted windows identifying the film as legal, but doesn't require it. Reputable installers usually apply one anyway.

Medical exemptions: Colorado does not recognize them

This is one of the most common pieces of misinformation about Colorado tint law: Colorado does not allow medical exemptions for darker window tint.

Some states (Arizona, Pennsylvania, New York, and others) allow drivers with documented medical conditions like lupus, severe photosensitivity, or certain skin conditions to legally install darker-than-normal tint. Colorado does not. There is no medical exemption process at the state level.

Drivers who need additional UV or light protection in Colorado have legal alternatives:

• High-end clear ceramic films that block 99% of UV without reducing visible light
• Tint at the legal 27–35% minimum, which still provides significant UV and heat protection
• Wide-brimmed hats, UV-blocking sleeves, or other personal sun protection during driving

Out-of-state vehicles in Colorado

If you've moved to Colorado from a state with looser tint laws — Texas, Florida, or Arizona, for example — your tint may not be legal here. Out-of-state vehicles temporarily in Colorado must have windows transmitting at least 20% VLT. Once you register the vehicle in Colorado, the full 27% VLT rule applies.

Drivers relocating to Colorado often need to remove and replace existing tint to comply. Many tint shops, including Summit Customs, offer tint removal as a standalone or bundled service.

Penalties for illegal tint in Colorado

Illegal window tint in Colorado is classified as a Class B traffic infraction. Penalties include:

• Fines ranging from $500 to $5,000 depending on the violation
• Possible escalation to a misdemeanor for repeated or egregious violations
• A "fix-it ticket" requiring removal or replacement of the illegal tint, with proof submitted to the court
• Potential impact on personal injury claims — illegal tint can be cited as a contributing factor in accident liability under Colorado's comparative negligence system

The fine range is wide because penalties depend on how dark the tint is, whether it's a first offense, and the discretion of the citing officer. First offenses on borderline-illegal tint often result in fix-it tickets without major fines. Repeated offenses or extreme violations (5% limo tint on front windows, for example) can result in much higher penalties.

How to know if your tint is legal

If you're not sure whether your existing tint complies, here's how to check:

1. Ask your installer for the VLT rating. A reputable shop will know — and typically applies a sticker noting the legal compliance.
2. Get it measured. Tint shops, including Summit Customs, can measure your existing tint with a calibrated VLT meter in a few minutes. Most won't charge for this.
3. Check during inspection. Many shops will inspect tint compliance for free as part of a quote consultation.

If your tint comes back below 27% on side windows, you have three choices: remove it, replace it with a legal film, or risk a citation. None of those are great — which is why getting it right the first time, with a shop that uses a meter, matters.

What we recommend for Colorado drivers

For most Denver-area drivers, the sweet spot is 35% VLT ceramic film on side and rear windows plus clear ceramic on the windshield. This combination:

• Stays comfortably within Colorado law on all windows
• Blocks 99% of UV (skin and interior protection)
• Rejects 50–70% of total solar heat (depending on film tier)
• Doesn't interfere with cell signal, GPS, or radar detectors
• Carries a lifetime warranty when professionally installed

Going darker than 35% on the front windows isn't worth the risk — the legal exposure outweighs the marginal benefit, and a quality ceramic at 35% performs better than a cheap dyed film at 20%.

For specific pricing on legal tint options, see our window tint cost guide for Denver.

Frequently asked questions

What is the darkest legal tint in Colorado? 27% VLT on all side and rear windows. Anything darker is illegal unless your front side windows and windshield both meet 70% VLT.

Is 20% tint legal in Colorado? No. 20% VLT is below Colorado's 27% minimum for side and rear windows. It is legal as the minimum for out-of-state vehicles temporarily in Colorado, but not for vehicles registered in the state.

Can I tint my windshield in Colorado? Yes, with limits. Non-reflective tint is allowed above the AS-1 line (top 4–5 inches). Below that line, tint must allow at least 70% of light through — which means traditional dark film is illegal but clear ceramic film is fully legal.

Are ceramic tints legal in Colorado? Yes. Ceramic film is legal as long as it meets the VLT requirements for each window position. Most ceramic films come in legal VLT ratings (35%, 50%, 70%).

Does Colorado have medical exemptions for window tint? No. Despite occasional online claims to the contrary, Colorado does not recognize medical exemptions for darker tint.

What's the fine for illegal window tint in Colorado? Fines range from $500 to $5,000 depending on severity. Most first-time offenses result in a fix-it ticket plus a smaller fine.

How is window tint enforced in Colorado? Officers can pull a vehicle over specifically for tint that appears to violate the 27% rule. They use a handheld VLT meter to measure the actual transmission. If it reads below 27%, a citation is issued.

Do I need to register or certify my window tint with the state? No. Colorado doesn't require certification or registration of installed tint. However, keeping documentation from your installer (showing the film brand, VLT, and install date) is smart in case of any dispute.

Can I have my tint removed and replaced if it's illegal? Yes. Most professional tint shops offer removal services, and replacing with legal film is straightforward. Removal typically runs $75–$200 depending on the vehicle.

What about my Tesla / luxury vehicle's factory rear tint? Factory privacy glass on Tesla, Mercedes, BMW, and many SUVs typically meets Colorado law because it's manufactured to permit 27%+ VLT. Adding additional film on top of factory glass is what gets drivers in trouble — you have to account for the combined VLT, not just the new film.

Get a legal, high-performance tint install

If you're looking to tint your vehicle within Colorado law, or need an existing tint checked or removed, we can help. As a 3M Pro Shop Dealer in Commerce City, Summit Customs installs premium ceramic films at every legal VLT level, with a lifetime warranty and free VLT verification on existing tint.

Get a free window tint quote →

Or call us directly: 303-499-1164

Summit Customs is a 3M Pro Shop Dealer based in Commerce City, serving Denver, Aurora, Boulder, Highlands Ranch, Thornton, and the entire Front Range.