Is it leagal to have red or blue non working lights on a vehicle?

In most jurisdictions, it is illegal for non-emergency vehicles to display red or blue lights. These colors are typically reserved for emergency vehicles, such as police, fire, and ambulances, to prevent confusion and ensure public safety. However, specific regulations can vary by state or country, so it’s important to check local laws regarding vehicle lighting. Always ensure that any lights on your vehicle comply with your local traffic regulations.