What color lights indicate a runway is approaching its end?

The color lights that indicate a runway is approaching its end are red lights. This is a standardized signaling system designed to provide visual cues to pilots, enhancing safety during landing and takeoff. Red lights are typically positioned at the runway's end to warn pilots that they are nearing the limit of the runway, alerting them to take necessary precautions when landing or taking off.

In contrast, blue lights are used to indicate taxiways, and yellow lights generally signify caution or advisory messages, such as warning pilots of potential hazards or changes in their operational environment. White lights are commonly used for runway edge lighting and do not signal the end of the runway. By using red lights specifically at the end of the runway, the signaling is clear and easily distinguishable from other types of lights, ensuring that pilots can quickly recognize critical information during their operations.