Which of the following is NOT a color code associated with hazmat placards?

The correct answer is green, as it is not one of the color codes associated with hazardous materials (hazmat) placards. Hazmat placards use specific colors to communicate the type of hazard a material presents to ensure safety during transportation.

Red is typically used to indicate flammable liquids and solids, conveying the associated fire risk. Blue is often associated with health hazards, indicating that exposure can cause serious health issues. Yellow denotes reactive hazards, showing that the material can react violently under certain conditions.

Green, however, is not a code used in the standard color-coding system for hazmat placards, which is intended to help first responders and transport workers quickly identify risks. Hence, understanding the significance of these color codes can enhance recognition and response in case of hazardous material incidents.