Underglow in Colorado
Colorado's rule is stricter than most: a non-emergency vehicle may not even be equipped with a lamp capable of displaying red or blue toward the front, any other use of green is a violation, and flashing displays are reserved by color for emergency and service vehicles. Steady white or amber accent lighting is the safe configuration.
Verified against primary sources · September 2026
What the law says
C.R.S. § 42-4-238 makes it a class 2 misdemeanor to drive or even control a non-emergency vehicle containing a lamp designed or capable of displaying red or blue visible from directly in front of the vehicle's center. § 42-4-213(4) limits green lights to a stationary emergency command post — any other use of green is a violation. Flashing displays are reserved by color (yellow for service vehicles, red/blue/green for emergency use, hazard flashers excepted), and extra front-facing lamps must show white or amber (§ 42-4-215).
Specific Limits
- Green
- green light use is limited to a stationary emergency command post
- Red blue
- a non-emergency vehicle may not even carry a lamp capable of showing red or blue from directly in front (class 2 misdemeanor)
- Front colors
- extra front lamps show white or amber
Frequently Asked Questions
Are underglow legal in Colorado?
What are the exact underglow limits in Colorado?
Street-legal underglow picks
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