What color is a CAS warning message?

A CAS (Crew Alerting System) warning message is conveyed through a red color, which is universally recognized as an indicator of a critical situation that requires immediate attention. The red color signifies that there is a serious issue that could pose a danger to the aircraft or its operation, prompting the crew to take urgent action to address the problem.

In contrast, other colors such as yellow may indicate cautionary messages that suggest a situation that should be monitored but does not require immediate action. Green generally denotes normal operating conditions, while blue often represents advisory messages that provide information without indicating a need for immediate concern. This color coding system helps pilots quickly assess the state of their aircraft and prioritize their responses accordingly, with red unequivocally alerting them to life-threatening or emergency conditions.