British and European Safety signs
Danger Identification Used to identify the perimeter of a hazard. The stripes are  BLACK  and  YELLOW  or can be   ORANGE .
Fire fighting Identifies fire alarms, extinguishers etc. RED  square background with  WHITE  writing or diagram.
Mandatory  Gives orders e.g. eye protection must be worn. BLUE  circular sign with  WHITE  writing or diagram.
Prohibition Prevention e.g. no smoking WHITE  circular background with  RED  border and cross bar.
Safe condition Indicates safety points e.g. first aid, fire exit etc. GREEN  square background with  WHITE  writing or diagram
Warning Identifies dangers e.g. danger of electric shock. YELLOW  triangle with  BLACK  border and  BLACK  writing or diagram.

Safety Symbols