Thinking about underglow for your car in Utah? Here is what the law says, and how to run it legally. Ready to install? See our RGBIC underglow kit and the install guide.

Is Underglow Legal in Utah? (2026 Guide)

Two rules are nearly universal across the US: no red light shown to the front and no blue underglow (both reserved for emergency vehicles), and no flashing, rotating, or strobing while driving. Beyond that, states differ. Here is how Utah handles it.

Underglow rules in Utah

• Not road-legal: Per Utah Highway Patrol guidance cited in legal summaries, underglow is not permitted for use on public highways; it is allowed on private property, off-road, or for display.
• Colors: No red or blue visible from directly in front, and no red, white, and blue combination that imitates an emergency vehicle. No flashing or rotating.
• Driving vs parked: Private property, off-road, and show use only.

Underglow while parked or on private property

Because Utah does not permit lit underglow on public roads, genuinely private property, a private lot, driveway, car show, or off-road, is the practical place to enjoy it, and those road rules generally do not reach private property. Be aware that a car parked on a public street is usually still treated as being on the highway, and red or blue lighting can trigger separate police-impersonation laws regardless of motion. Keep to compliant colors and check local ordinances.

How to stay legal with underglow in Utah

• Keep the lights steady-burning, never flashing, strobing, or rotating.
• Show no red light to the front, and avoid blue entirely.
• Do not mimic emergency-vehicle lighting or obscure your license plate.
• Confirm the current rule below and check locally before driving with it on.

The law

Utah Code 41-6a-1616 (red and blue lights) and 41-6a-1618 (unapproved lighting equipment). You can read the referenced law here: Utah statute.

Ready to install?

Our RGBIC underglow kit lets you dial in any color and keep it steady, and the install guide covers wiring it to a switched power source. Free shipping on all US orders.

Utah Underglow FAQ

Is underglow legal in Utah?
Underglow is not permitted for use on public highways per state guidance; allowed on private property, off-road, or for display. Keep the lights steady, show no red to the front, and avoid blue.

What underglow colors are illegal in Utah?
No red or blue visible from directly in front, and no emergency-style red, white, and blue combination. Flashing or strobing of any color is not allowed.

Can I have underglow on while parked in a lot?
On genuinely private property, such as a private lot, driveway, or car show, underglow use is generally far less restricted. On a public street a parked car is usually still treated as being on the highway, so the color rules still apply, avoid red and blue, and check your local ordinances.

Updated July 2026.