What color indicates a call from the flight deck on the flight attendant indicator panel?

The flight attendant indicator panel uses a red color to indicate a call from the flight deck. This color serves as a universal signal for urgency and attention, ensuring that flight attendants can quickly recognize and respond to calls from the pilots. The red indication clearly communicates the importance of the communication from the flight deck, prompting immediate action or acknowledgment from the cabin crew.

In aviation operations, color coding is critical for rapid recognition of signals, and red is commonly associated with crucial alerts. Other colors on the panel may serve different purposes, such as routine communication or alerts from other systems, but red specifically denotes communication from the flight deck, reflecting the structured protocol followed in aircraft operations.