Which light in the Master Call Panel indicates a passenger calling from their seat?

The light that indicates a passenger calling from their seat is the blue light in the Master Call Panel. When a passenger uses the call button located at their seat, the blue light notifies the cabin crew that assistance is needed from that specific seat. This system allows flight attendants to efficiently respond to passenger requests without confusion, as each call button alerts them to the location of a specific request.

The other light colors serve different purposes: for instance, the amber light typically indicates that a crew member is needed in a particular area, the pink light is often associated with calls from the lavatories, and the red light usually denotes a more urgent situation, often related to cabin crew emergencies or alerts. Understanding these distinctions helps ensure that flight attendants can prioritize and manage passenger needs effectively during the flight.