What does the blue color on the car's water temperature gauge mean?

[Paisley]

Car's water temperature gauge showing blue indicates that the water temperature is low. Generally, cars use mechanical indicator gauges for water temperature. When the pointer is in the blue zone, it means the car's water temperature is low; when it's in the red zone, it indicates the water temperature is high. The normal operating water temperature for a car is 90 degrees Celsius. Low water temperature is usually caused by a cold start. After driving for a while or idling for some time, the car's water temperature will rise. If the water temperature exceeds 90 degrees, it indicates overheating, and the car should not be driven further. Prolonged driving with excessively low water temperature prevents the engine from reaching its optimal operating temperature, leading to poor lubrication and significant wear on engine components.