What kind of vehicle has a blue warning light on the roof?

[EllaFitz]

The vehicle with a blue warning light on the roof is an ambulance. Ambulance warning lights come in only one color, which is blue, because blue symbolizes emergency care. Below is some related information about the colors of warning lights on vehicle roofs: 1. Warning light colors on police cars: The red color of police lights is a primary color in the warm color spectrum, serving as a warning, while blue is a primary color in the cool color spectrum, creating a sharp contrast with red and drawing more attention. 2. Warning light colors on fire trucks: The front top of the fire truck's cab has a long row of red warning lights, and the rear top is equipped with a round red warning light. The roof is fitted with two 24V, 60W scene lights at the front and rear. The sides of the vehicle are each equipped with red and blue flashing lights, with safety marker lights and side retro-reflectors installed below. The vehicle also has front and rear clearance lights, turn signals on each side, and interior lights in the crew compartment, equipment box, and pump room.