What colour are the edge lights marking the boundary of taxiways?

The edge lights marking the boundary of taxiways are blue. This color designation is crucial for guiding pilots and ground vehicle operators. Blue lights are used to delineate the edges of taxiways, making it easier to identify where the taxiway ends and the surrounding area begins, especially in low visibility conditions.

Each color of airfield lighting serves a distinct purpose and helps convey specific information to pilots and ground operators. The blue edge lights play a vital role in maintaining safe movement across the airfield, ensuring that vehicles and aircraft remain on designated paths.

In contrast, other colors have different meanings: white lights are typically used for runway edge identification; red lights often indicate areas such as runways or taxiway stop bars, serving as warnings; and green lights usually denote the centerline of the runway. Understanding these color codes is essential for safe operations in the airport environment.