These signs are intended to indicate potential, type, and degree of the hazard that may lead to accidental injury or property damage. They are intended to define specific hazards by conveying a clear, easily understood message. The sign headers and colors used in accident prevention safety signs are specified by OSHA and ANSI to designate the severity of the hazard. Each color has a specific role.

SAFETY FIRST (green): Indicates general instructions relative to safe work practices, remind of proper safety procedures, and indicate the location of safety equipment.