What color indicates contaminated areas on a military map overlay?

On a military map overlay, yellow is used to indicate contaminated areas. This color convention is part of the standard symbology employed in military operations to ensure clear communication and situational awareness. The use of yellow specifically signifies caution or potential danger, alerting personnel to areas that may pose health risks due to contamination, such as chemical, biological, or radiological hazards. This visual cue is crucial for maintaining safety and operational effectiveness during missions. Other colors are designated for different meanings, which is why yellow serves a unique and important purpose in indicating contamination.