Picking a tint shade sounds simple until you’re staring at a chart of percentages and none of them mean anything. Is 35% dark? Is 5% even legal? Will the shade you want get you pulled over on the 405?
Here’s the plain version. Window tint is rated by VLT, short for Visible Light Transmission. It’s the share of light the film lets through. A 5% tint lets 5% of light in, so it’s nearly blacked out. A 70% tint lets most light through and looks almost clear. Lower number, darker glass.
Below is what each common level actually looks like, who tends to pick it, and where California’s tint law draws the line.
What VLT Percentage Actually Means
VLT measures how much visible light passes through your film and glass together. The number printed on a film roll is the film’s rating on its own. But factory glass already blocks some light, so the finished window usually reads a little darker than the film’s number by itself.
That matters here, because California measures the installed result, not the film off the roll. A shop that knows the local rules will account for your glass so you don’t fail a roadside check.
5% Tint (Limo)
This is the darkest tint most people ever see. From outside, the glass looks black and you can’t make out anyone inside. They call it “limo” for a reason.
Drivers pick 5% for privacy and the blacked-out look, and it cuts glare and heat well. The trade-off: you can’t see much out of it at night. And in California it’s only legal on the rear windows of certain vehicles, never up front. More on that below.
20% Tint
At 20%, the glass reads clearly dark from outside, but you can still catch a faint outline of people or objects inside when the light’s good. It’s a popular middle-dark pick for people who want strong privacy without going full limo.
Twenty percent blocks a lot of glare and heat and looks sharp on most vehicles. Like 5%, it’s too dark for front side windows under California law, so it lives on the back glass.
35% Tint
Thirty-five is the sweet spot for a lot of drivers. It gives a clearly tinted, finished look while still letting you see out well, day or night. From outside you can see into the car more than you’d expect, but the shade reads as a real tint, not a whisper.
This is often the darkest level people can comfortably run all the way around without night-driving trouble. Whether it clears California’s front-window rule depends on the film, though. A 35% film on top of factory glass can dip under the 70% front limit, so front-window use needs a shop that measures the installed result.
50% Tint
Half the light in, half out. Fifty percent doesn’t look especially dark, but it does real work: cutting glare, blocking heat, screening a good chunk of UV. It’s a common pick for drivers who mostly want comfort and sun protection instead of a dark look.
Because it’s light, 50% is the level people often ask about for front side windows. On its own the film sits well above the 70% threshold. But remember, film plus glass is what gets measured, so confirm the installed VLT before you assume it’s road-legal up front.
70% Tint
Seventy percent is nearly invisible. You’d struggle to tell it’s there from a few feet away, and you can see straight through it in any light. So why bother? Because a quality 70% ceramic film still blocks the majority of heat and UV without darkening the glass at all.
This is the go-to for front side windows in California, and for anyone who wants sun and heat protection while keeping the windows looking factory. It’s also the honest answer to “how dark can I legally go up front here?”
Window Tint Levels at a Glance
| VLT % | How it looks | Common use | CA front side windows |
|---|---|---|---|
| 5% | Blacked out, can’t see in | Rear privacy, limo look | Not legal |
| 20% | Clearly dark | Strong rear privacy | Not legal |
| 35% | Noticeably tinted, still see-through | All-around darkest comfortable | Depends on installed VLT |
| 50% | Lightly tinted | Heat/glare/UV, subtle look | Usually legal, verify installed VLT |
| 70% | Nearly clear | Front windows, heat/UV protection | Legal |
What’s Legal in California
California measures tint by the finished VLT on the window, and the rules split by which window you’re tinting. Straight from the state’s limits:
- Front side windows (driver and passenger): must let more than 70% of light in. In practice that means a very light film or a heat-blocking clear-style ceramic.
- Rear side windows and rear windshield: any darkness is allowed, as long as the vehicle has dual outside mirrors, which nearly every modern car does.
- Windshield: non-reflective tint only, on the top 4 inches maximum. No dark banding below that line.
- Reflectivity: front-window film can’t be more reflective than plain glass.
There’s also a medical exemption. California allows darker front-window tint for drivers with a documented light-sensitive condition, backed by a signed statement from a licensed physician. The windshield rules don’t change even with an exemption.
So you can go as dark as you want in the back, but the front seats have a hard limit. A shop that installs to California spec will get you privacy where it’s allowed and keep you legal where it counts. For the full breakdown, see our California window tint law guide.
Which Level Should You Pick?
- Want maximum privacy and a blacked-out rear? 5% or 20% on the back glass.
- Want one tint all the way around that still looks tinted? 35% is the usual answer. Just confirm the front windows measure legal.
- Mostly after heat and UV comfort? 50% front and back, or 70% up front with something darker in the rear.
- Want the windows to look factory while blocking heat? 70% ceramic on the front, your call in the back.
The right pick usually isn’t one number for the whole car. Most drivers run a legal light film up front and go darker in the back for privacy. You get the legality where it matters and the privacy where it’s allowed.
Frequently Asked Questions
Q: What’s the darkest legal tint in California?
On the front side windows, you can’t go below 70% VLT. On the rear side windows and rear windshield there’s no darkness limit, as long as your vehicle has dual side mirrors, so you can run 5% back there.
Q: Is 35% tint legal in California?
On the back windows, yes. Any darkness is fine there. On the front side windows, 35% is too dark on its own, because those windows have to stay above 70% VLT. Front use would need a medical exemption.
Q: What does 20% tint look like?
Clearly dark from outside, with a faint outline of what’s inside visible in bright light. It reads as a strong, obvious tint without being fully blacked out like 5%.
Q: Will darker tint block more heat?
Not necessarily. Heat rejection comes from the film’s technology, not its shade. A good 70% ceramic film can block more heat than a cheap 5% dyed film.
Q: Can I get a ticket for illegal tint in California?
Yes. Front windows darker than the 70% limit can draw a fix-it ticket. Installing to California spec from the start avoids the hassle.
Ready to Tint the Right Way?
We tint to California spec, so you get the privacy and heat protection you want without the ticket you don’t. Get a free quote or contact us to talk through the right level for your vehicle.
