Which color on the airspeed indicator identifies the power-off stalling speed in a specified configuration?

The power-off stalling speed in a specified configuration is marked by the lower limit of the green arc on the airspeed indicator. The green arc represents the normal operating range for the aircraft, which includes safe speeds for flying. The lower limit of this arc indicates the minimum speed at which the aircraft can maintain controlled flight without stalling, specifically when in a specified configuration, such as landing or during a glide.

Being able to recognize this speed is crucial for pilots, as it helps ensure that they do not unintentionally enter a stall condition. Understanding the implications of the green arc's lower limit aids in maintaining safe operation during critical phases of flight, such as approach and landing. This speed is vital for effective aircraft performance and safe piloting.