Colorado Emergency Vehicle Light State Statutes

Colorado uses a color coded system and specific mounting/visibility rules to separate true “authorized emergency vehicles” from “authorized service vehicles.” In practice, this means red (plus limited blue/white combinations) for police and fire/EMS, amber for construction, utility, and tow, special blue allowances for government snowplows, and tightly controlled volunteer use. The controlling law is found in the Colorado Revised Statutes, Title 42 (Vehicles and Traffic), and the statewide administrative standard that specifies visibility and performance (including the “visible 500 feet in normal sunlight” rule and permitted color combinations) is 2 CCR 601-20. See official sources: Colorado Revised Statutes, Title 42 (Vehicles and Traffic) and 2 CCR 601-20 (Authorized Service Vehicles).

Throughout this page, we reference the applicable sections (noted as C.R.S. § 42-4-213, § 42-4-214, and § 42-4-222) and summarize how agencies, fleets, and volunteers should comply in real-world scenarios.

HCU & snippet-ready overview: Police may use red with additional blue/white, fire/EMS use red with optional white/blue accents, command posts may display green (stationary), volunteers may request permits for red (with limited white), tow/utility/construction use yellow (amber) warning lights; white may be used on a light bar to heighten visibility of yellow where permitted by 2 CCR 601-20, state/local government snowplows may add two blue lamps to amber during active plowing, and all warning lights must meet 500-ft daytime visibility with proper mounting and flash patterns consistent with 2 CCR 601-20.

Below is a reference table summarizing how Colorado designates emergency lighting by vehicle type. The following sections provide expanded explanations and statutory detail:

Colorado emergency light color allowances by vehicle type reference table
Vehicle Type	Permitted Warning Light Colors	Notes / Restrictions
Police / Law Enforcement	Red; may add blue and/or white	Authorized emergency vehicle framework (C.R.S. § 42-4-213). Must meet 500-ft daytime visibility standard. Green is limited to a single stationary command post vehicle at an incident scene.
Fire / EMS Vehicles	Red; may add blue and/or white	Authorized emergency vehicle framework (C.R.S. § 42-4-213). Must meet 500-ft daytime visibility standard. Green is limited to a single stationary command post vehicle at an incident scene.
Tow Trucks / Road Service	Yellow (amber); white allowed only to heighten yellow (light bar)	Authorized service vehicle framework (C.R.S. § 42-4-214; 2 CCR 601-20). Use only during active hazard/roadside operations. Must meet 500-ft daytime visibility standard.
Construction / Utility / Maintenance	Yellow (amber); white allowed only to heighten yellow (light bar)	Authorized service vehicle framework (C.R.S. § 42-4-214; 2 CCR 601-20). Use only during active work/hazard operations. Must meet 500-ft daytime visibility standard.
Government Snowplows (state/county/local)	Yellow (amber) plus up to two blue warning lamps	Blue is limited to authorized service vehicle snowplows operated by a state, county, or local government. Blue is in addition to required yellow warning lamps and should be used only during active plowing operations.
Volunteer Firefighters / Volunteer Ambulance Attendants (personal vehicles)	Red; may add white or red/white	Permit/authorization required (C.R.S. § 42-4-222). At least one lamp must be mounted on the top of the vehicle. Must meet 500-ft daytime visibility standard. Warning lights do not automatically grant emergency driving privileges.
Private Security	Yellow (amber); white allowed only to heighten yellow (light bar)	Not an authorized emergency vehicle. Must follow authorized service vehicle limitations. No red or blue; use only during hazard-related operations.
Pilot / Escort Vehicles	Yellow (amber); white allowed only to heighten yellow (light bar)	Authorized service vehicle framework for oversize/overweight escort operations. Rooftop warning recommended for 360° conspicuity; use only during active escort/hazard operations.

Police Lights in Colorado

Colorado places law enforcement vehicles squarely within the “authorized emergency vehicle” category referenced in C.R.S. § 42-4-213. Operationally, that yields three core requirements and three allowances:

Core requirements that agencies should treat as nonnegotiable
- A red warning signal lamp is the baseline for an authorized emergency vehicle. Under Colorado practice, the red signal must be “flashing, oscillating, or rotating” and mounted high enough for 360° situational awareness and long-distance recognition in mixed traffic.
- Daytime conspicuity: Colorado’s emergency strobe lighting must be visible at 500 feet in normal sunlight. That standard comes from the statewide device rule, 2 CCR 601-20, which also governs intensity and color combinations to harmonize fleet safety while minimizing glare and distraction for the public.
- Appropriate use: Colorado expects activation only when the vehicle is engaged in official responses, traffic control, or other statutorily recognized operations that require “due regard” for other road users.
Police vehicle note: C.R.S. § 42-4-213 states a police vehicle, when used as an authorized emergency vehicle, may but need not be equipped with the red lights specified in that section. Agencies should follow Colorado State Patrol/local policy and standardize lighting so motorists receive consistent red/blue warning cues.
Color allowances designed for scene management and officer safety
- Blue (with red): Agencies commonly supplement red with blue to improve conspicuity in multi-lane traffic and at closing speeds common on I-25/I-70 corridors. Colorado permits the use of additional blue and white lighting on authorized emergency vehicles; agencies usually deploy blue headlight flashers, grille modules, rear deck lights, and arrow functions to strengthen “move over” compliance.
- White: Limited white is permitted to increase scene illumination or forward conspicuity, often as part of flash heads integrated into headlamps, light bars, and intersection lights.
- Green (command post): Colorado allows green lights to mark a stationary command post vehicle during incidents. Green must be limited to the designated command vehicle and used at the stationary incident command location (not while the vehicle is moving).

Industry Reality Check: Colorado is one of the few states using stationary green for incident command. If you are outfitting a Command SUV, ensure your Green LED Strobe is on a separate switch from your red/blues to prevent accidental activation while in motion, which is a citable offense.

Unmarked and specialized units

Colorado recognizes that investigative or undercover units may be exempt from displaying obvious warning equipment under certain conditions. Agencies should ensure those units remain compliant with minimum on-demand warning requirements (e.g., portable red/blue deck lights or internal visor lights) to meet the “authorized emergency vehicle” standard when a covert stop or immediate response becomes necessary.

For agencies upgrading patrol bars, intersection modules, or interior setups, see Police Lights for compliant configurations and lumen/optic options that balance piercing visibility with controlled flash patterns for officer safety.

Fire and EMS Vehicle Lights in Colorado

Fire apparatus and EMS units follow the same statutory umbrella for authorized emergency vehicles as law enforcement, but the context of deployment differs: large apparatus need 360° visibility during multi-unit responses, residential-area navigation, and roadside medical scenes.

Required red with supplemental colors: Fire engines, ladder trucks, rescues, chief/command SUVs, and ambulances must carry red warning lamps; Colorado also authorizes white and blue as supplemental conspicuity colors on these vehicles. Many Colorado fire/EMS fleets use powerful white intersections and forward facing scene strobe lights to punch through winter glare, with blue/red patterns on light bars, mirrors, and rear brow lights to improve approach recognition and driver yielding behavior.
Stationary green for command posts: Similar to police incidents, a stationary command post may display green to clearly differentiate incident command on multi-agency scenes (e.g., wildland interface, multi-vehicle pileups on mountain passes, or structure fires with unified command). Green is limited to the single command post location to avoid confusing drivers and responders.
Chief officers and response SUVs: Colorado departments regularly outfit chief/EMS supervisor vehicles with full-size roof bars or stealth interior systems (visor/dash/grille) to ensure both response safety and residential sensitivity.
Ambulance specifics: The required red must be visible at 500 feet in daylight, with evenly distributed flash heads at the upper corners, grille, and rear for balanced forward and rear coverage across the vehicle’s squared profiles.

For apparatus and rescue configuration ideas, from perimeter warning to traffic advisors and steady burn scene options, see Fire Truck Lights and, for system level signal choices, LED Warning Lights.

Construction, Tow, and Utility Vehicle Lights

Colorado distinguishes “authorized service vehicles” from “authorized emergency vehicles.” The difference is crucial: authorized service vehicles use yellow (amber) warning lamps, and where permitted by 2 CCR 601-20, white lamps may be used on a light bar only to heighten the visibility of yellow. Authorized emergency vehicles use red as the primary warning color with specified supplemental colors under the applicable emergency vehicle rules. Under C.R.S. § 42-4-214, service vehicles include tow trucks, construction, maintenance, sanitation, power/telecom utility, pilot/escort, and similar hazard generating operations on or near the roadway.

Industry Reality Check: Colorado winter conditions create massive glare. While 2 CCR 601-20 allows white to heighten amber, we recommend using High-Intensity Amber TIR Optics for your primary bar to punch through heavy snowfall without the 'white-out' reflection common with standard strobe units.

Yellow (amber) is the required warning color: Authorized service vehicles must display flashing, oscillating, or rotating yellow warning lamps. Under 2 CCR 601-20, white lamps may also be used on a light bar only to heighten the visibility of the yellow lamps. This yellow-forward standard reduces confusion with red/blue emergency responses while still providing strong “slow down/move over” cues for work zones, shoulder operations, and rolling lane closures.
Where and when to use yellow/amber: Colorado expects these warning lights to be used only while the vehicle is actively creating a traffic hazard: towing/recovering, performing work in or near the travel way, or escorting an oversized load. Leaving amber on during normal travel is discouraged and may be cited if it confuses drivers or dilutes compliance.
Visibility and mounting: As with emergency vehicles, device rules in 2 CCR 601-20 call for 500-ft daylight visibility. Work trucks should mount bars or beacons as high as practical (rooftop beacons, headache rack bars, or mini-bars on equipment cabs) and ensure rear-facing modules are not blocked by ladders or booms.

Tow fleets typically combine a roof beacon or mini bar with rear stick lights or integrated arrow functions. For durable, low profile hazard systems, consider Construction Vehicle Lights and modular LED Light Bars sized for pickups, medium duty wreckers, and bucket trucks.

Volunteer, Security, and Pilot Car Lights

Colorado recognizes volunteers but keeps their lighting highly standardized to prevent misidentification and to maintain response discipline.

Volunteer firefighters (personal vehicles): Under C.R.S. § 42-4-222 (Volunteer firefighters and volunteer ambulance attendants), qualified volunteers may equip their personal vehicles with warning lights only after obtaining the appropriate authorization/permit from their departments and authorities. The permitted color set centers on red, with limited white (or red/white combinations). At least one lamp must be roof mounted for 360° visibility, and patterns must be flashing/oscillating/rotating, not steady burn. These vehicles do not gain “authorized emergency vehicle” driving privileges merely by adding lights; privileges depend on proper authorization and operations consistent with Colorado law.

Pro Tip: For volunteers needing to meet the roof mount requirement without permanent vehicle damage, we recommend Top Mounted Magnetic Mini Bars that are rated for 70mph+ speeds.

Volunteer ambulance attendants: The same section allows permitted volunteers supporting ambulance services to use red (with limited white) on their personal vehicles, following the same mounting and visibility standards.
Security vehicles (private): Private security is not an authorized emergency service in Colorado. Security companies are not authorized emergency vehicles. They must follow the authorized service vehicle rules: yellow (amber) warning lights are permitted for hazard/roadside operations; white may be used on a light bar only to heighten yellow visibility where configured under 2 CCR 601-20. Red or blue is not permitted. Security vehicles must follow the same authorized service vehicle limitations as construction or utility fleets. No red or blue.
Pilot/escort vehicles: Escort vehicles for oversize and overweight loads must run amber, not red/blue, with rooftop mini bars or beacons mounted high and visible from all directions. Their purpose is hazard advance notice and lane/channeling, not emergency response duplication.

If your district needs a simple, compliant volunteer setup, start with a low profile interior package such as LED Visor Lights paired with a discrete rear stick; or a rooftop Mini Light Bars when 360° coverage is required by your chief’s policy and the permit.

Color Designations and Usage

Colorado’s color scheme is strict by design:

Red (primary emergency): Required for authorized emergency vehicles: police, fire, EMS.
Blue (supplemental emergency): May be added to authorized emergency vehicles to increase conspicuity, most commonly paired with red. Not permitted for service vehicles, except a narrow snowplow exception for government fleets (see below).
White (supplemental): Permitted on emergency vehicles as a supplemental conspicuity color (often forward facing or intersection modules), and used on some work platforms as “scene” illumination when not flashing as a “warning” lamp.
Green (command post only): May be used to mark a stationary incident command vehicle at the scene. It is not a general response color and should not be used in motion.
Yellow/Amber (service/hazard): The required warning color for authorized service vehicles. Under 2 CCR 601-20, white may be used on a light bar to heighten the visibility of yellow. Red (alone or with blue/white) is reserved for authorized emergency vehicles.

Color links & selection guides: If your operation is service/hazard only, stick to amber platforms like Amber Strobe Lights. For police and combination response fleets, red/blue packages like Red Blue Strobe Lights provide the most recognized emergency signature in Colorado.

Mounting, Flash Patterns, and Visibility Rules

Colorado applies practical engineering standards so that the public perceives intent quickly and yields appropriately:

500 ft daytime visibility: Warning lamps must be visible at 500 feet in normal sunlight, a rigorous benchmark that screens out underpowered or mis-aimed modules. The standard is part of 2 CCR 601-20’s minimum design/installation rules.
Mounting height and 360° concept: Agencies and fleets should mount primary beacons/bars “as high as practicable” to clear cargo and bodywork and to project light above traffic. Rooftop bars on SUVs/trucks, or cab beacons on loaders and plows, achieve the intended result: conspicuity from all approach angles.
Flash patterns: “Flashing, oscillating, or rotating” remain the permitted motion states for warning signals. Modern LED strobe bars simulate rotation via alternating arrays; ensure your chosen pattern is approved by your agency SOP and consistent with 2 CCR 601-20’s intensity/placement principles.
Headlight/taillight integration: Where agencies use headlight/taillight flash modules, make sure they remain coordinated with the primary bar to avoid washout. Do not allow steady burn white to overpower red/blue at night; reserve scene whites for stationary operations.
Rear traffic advisors: In Colorado’s mountain corridors and metro arterials, directional sticks dramatically improve safe tapering. Many agencies require a rear arrow board mode on any vehicle routinely working a lane closure or shoulder occupying response.

Explore compliant rear traffic control here: Traffic Advisor Light Bars.

Permits and Enforcement

Colorado uses a permit-and-policy approach to keep volunteer usage narrow and to ensure private fleets don’t drift into “emergency” territory:

Volunteer permits (fire/EMS): C.R.S. § 42-4-222 envisions a formal authorization pathway. Volunteers should work through their chief or EMS director to request the permit, specify equipment, and confirm mounting and color compliance. Once permitted, use remains limited to official response or sanctioned ceremonies (e.g., funerals, parades), and the lighting package does not automatically grant “code 3” driving privileges.
Service vehicle status: Tow, utility, and construction vehicles do not need “emergency” permits but must comply with authorized service vehicle color and usage limits (yellow/amber warning lamps; white allowed only to heighten yellow on a light bar where permitted), namely, lights on only during hazard creation (recovery, roadside repair, escort) and off during normal travel.
Command post green: Agencies should codify in policy which unit displays green at an incident, how it’s activated, and when it’s removed to prevent inconsistent signaling.
Enforcement realities: Misuse (e.g., red/blue on private security; amber left on during regular travel; unpermitted volunteer use; green while moving) can draw citations and undercut public trust. Colorado’s 2 CCR 601-20 gives officers clear benchmarks (e.g., 500 ft conspicuity) during inspections.

For a quick reference to device families and intensities that satisfy enforcement scrutiny, review LED Strobe Lights and the high output, low current solutions in Interior/Exterior LED Stick Lights.

Recommended Lighting Equipment

This section maps Colorado’s legal framework to practical, compliant configurations, prioritizing visibility, durability, and controlled flash patterns.

Police patrol/SO/state patrol: Pair a full size roof bar or stealth interior bar with front corners, grille modules, mirror/fender intersections, and a rear traffic advisor. For full patrol build outs see Police Lights and grille/perimeter options in Grille and Surface Mount Lights. For siren/PA integration, see Police Sirens.
Fire apparatus/ambulance: Use full size bars or dual stacked bars for large profiles, add white scene lighting with selectable steady burn for nighttime EMS/extrications, and ensure high mounted rear advisors for safer blocking on grades.
Volunteer chief/command SUVs: A low profile bar or interior visor system preserves vehicle aesthetics while meeting the red (with limited white/blue) scheme. Add a compact rear stick for quick on scene control. See Volunteer Firefighter Lights
Tow/utility/construction: Yellow (amber) mini bars and beacons are the backbone. Where configured under 2 CCR 601-20, white may be used on a light bar only to heighten yellow visibility. Add durable rear sticks for lane-control and roadside safety. Consider weather sealed housings and vibration resistant mounts for gravel roads and heavy equipment.
Pilot/escort: A prominent amber mini bar or full bar paired with a rear arrow mode helps on steep grades and long two lane escorts. See Pilot Car Lights.

Core hubs and color guidance for Colorado compliance:
Browse high output platforms in LED Light Bars, LED Strobe Lights, and perimeter add ons in LED Warning Lights. For color specific compliance, choose Amber Strobe Lights for service fleets and Red Blue Strobe Lights for authorized emergency vehicles.

Penalties for Unauthorized Use of Emergency Lights

Colorado enforces improper lighting under its vehicle and traffic framework. Typical violations include:

Using red/blue on a non-authorized vehicle (e.g., private security or personal vehicle without authorization).
Volunteers running red/white without a permit or using warning lights outside sanctioned responses or ceremonies.
Service vehicles (tow/utility) operating blue or red/blue, or leaving yellow/amber warning lights on during regular travel and non-hazard conditions.
Command post green displayed while the vehicle is moving or by multiple units simultaneously.

Consequences can include traffic infractions and fines, and misuse that contributes to an incident can increase civil exposure. For enforcement categories, see the violation language in the controlling sections.

Mountain & Plains Regional Compliance: Utah, Wyoming, Kansas, & Nebraska Statutes

Many Colorado agencies, utilities, and pilot/escort operators work across borders. Review neighboring rules before crossing the state line:

Use each page to confirm color allowances and volunteer permit rules; most border states also reserve red/blue for emergencies and require amber for service.

Frequently Asked Questions

Can my private security company use blue lights in Colorado?

No. Security is not an “authorized emergency service.” Your vehicles must follow authorized service vehicle rules: yellow (amber) warning lights are permitted for hazard/roadside operations, and white may be used on a light bar only to heighten yellow visibility where configured under 2 CCR 601-20. Red or blue is not permitted.

I am a volunteer firefighter. Can I run red/white on my personal truck?

Yes, only after receiving the proper authorization under C.R.S. § 42-4-222 (with departmental sign off). You must mount at least one roof light, keep patterns flashing/oscillating/rotating, and follow all response policies. The authorization does not transform your personal vehicle into a full “authorized emergency vehicle” for driving privileges.

We run a municipal snowplow fleet. Can we add blue lights?

Yes. An authorized service vehicle snowplow operated by a state, county, or local government may use no more than two flashing/oscillating/rotating blue lights in addition to required yellow warning lamps.

Are green lights legal on moving vehicles?

Green in Colorado is reserved for a stationary command post at an incident scene. Do not use green while driving.

Disclaimer

Disclaimer: The emergency vehicle light state statute guide was created by Extreme Tactical Dynamics as a guide and reference. We make no claim to the accuracy or validity of this guide. This guide was written to the best of our knowledge and has been provided to our customers as a courtesy ONLY. The information in this guide is our interpretation of the law as we have read it. We cannot be held responsible for any errors as this is only our interpretation of the law and the laws are constantly changing. We cannot be held liable or responsible for any errors and recommend that our customers refer to their local authorities to confirm the particular statute that governs their use of emergency vehicle lights.

Contact Information

Primary point of contact: Colorado State Patrol (public & commercial vehicle safety). Front desk routing for statutes/questions is maintained on their official channels. For statute text and statewide device requirements, consult the official government publications linked at the top of this page: Colorado Revised Statutes, Title 42 (Vehicles and Traffic) and 2 CCR 601-20.

Colorado State Patrol Headquarters
700 Kipling St., Lakewood, CO 80215
Non-Emergency: 303-239-4501
Emergency: 911