Which color-coded placard indicates the presence of harassing agents?

The color-coded placard that indicates the presence of harassing agents is yellow. In the context of military operations and chemical safety, different colors are used to signify the type of hazard present. Yellow specifically designates chemicals that may irritate or harm personnel, commonly categorized as harassing agents. These agents are often designed to incapacitate rather than kill, making it crucial for personnel to recognize the yellow placard indicating their presence to take appropriate precautions and responses. Understanding these color codes is essential for ensuring safety and effective operational planning in environments where chemical agents may be a risk.