Can you have blue fog lights?

The legality and appropriateness of using blue fog lights on a vehicle vary depending on the jurisdiction and specific regulations in place. Here’s a comprehensive overview to help clarify the situation:

International and National Regulations

1. United States: In the United States, the Federal Motor Vehicle Safety Standard (FMVSS) No. 108 governs the lighting requirements for motor vehicles. This standard does not permit the use of blue lights on road-going vehicles except for emergency vehicles. Specifically, blue lights are reserved for police, fire, and emergency medical services (EMS) vehicles, and their usage is strictly regulated. Fog lights must emit either white or amber light, according to these standards.

2. Europe: European Union (EU) regulations, specifically ECE Regulation 48, dictate that front fog lamps must emit a white or selective yellow light. Blue lights are not allowed for fog lights or any other forward-facing lights on regular passenger vehicles, as blue is reserved for emergency services.

3. Australia: In Australia, the Australian Design Rules (ADRs) also specify that fog lights must emit a white or selective yellow light. Blue lights are prohibited for regular vehicles.

4. Japan: Japanese regulations follow similar guidelines, restricting non-emergency vehicles from using blue lights on the road.

Reasons for Restrictions

Safety: Blue light has a shorter wavelength and can scatter more easily in certain atmospheric conditions, potentially causing glare and reducing visibility for oncoming drivers. This is why it’s important to regulate the color of lights to minimize distractions and ensure safe driving conditions.

Emergency Identification: Blue lights are associated with emergency services worldwide, and their exclusive use helps ensure that emergency vehicles can be quickly identified by other road users, allowing for the necessary right-of-way and response.

Aftermarket Modifications and Exceptions

While it’s generally not legal to install blue fog lights on a regular passenger vehicle for on-road use, some enthusiasts modify their cars for off-road or show purposes where these regulations might not apply strictly. However, it’s crucial to understand that even off-road use can be subject to local laws and regulations, and installing blue fog lights could still lead to legal issues or safety concerns.


In summary, blue fog lights are not legally permitted for use on regular passenger vehicles in most jurisdictions worldwide, including the United States, Europe, Australia, and Japan. The restrictions are in place for safety reasons and to maintain clear differentiation between emergency vehicles and civilian cars. If you’re considering modifying your vehicle’s lighting, it’s essential to adhere to the applicable regulations to avoid fines, penalties, or compromising road safety. Always check your local laws and regulations before making any modifications to your vehicle’s lighting system.

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