What color should reflectors be found on a vehicle during inspection?

Reflectors on a vehicle are specifically designed to enhance visibility and safety, particularly during low light conditions or at night. The primary color for reflectors on the rear of a vehicle is red. This color is universally recognized as indicating the rear of the vehicle to other drivers, helping to prevent collisions by ensuring that the vehicle is easily detectable when seen from behind.

The other options listed are not standard for rear reflectors. Orange or yellow reflectors are commonly used on the sides of vehicles or for certain warning applications, but they do not serve the same purpose as the red reflectors found at the back. Green and blue are not colors used for vehicle reflectors at all, and thus do not meet the safety standards required for reflecting light to indicate the presence of a vehicle on the road. The emphasis on red reflectors plays an essential role in promoting road safety by clearly signaling the vehicle's position and direction to drivers approaching from behind.