Which color represents the outer marker beacon in aviation?

The outer marker beacon in aviation is represented by the color blue. This color coding is standardized for navigational aids and helps pilots quickly identify the function and position of various beacons during an approach. The outer marker specifically indicates the point at which an aircraft is approximately three to five miles from the landing runway, providing crucial information for pilots to confirm their distance and readiness for descent.

Understanding the color associations in aviation beacons is vital for instrument navigation, as it aids in situational awareness and ensures compliance with standard operating procedures.