| Warning colour | Type of sign | Instructions and information |
| Red | Prohibition sign | Dangerous behaviour |
| Red | Alarm sign | Stop Shutdown Emergency cutout devices Evacuate |
| Red | Fire protection sign | Identification and location |
| Yellow or amber | Warning sign | Be careful Take precautions Examine |
| Blue | Mandatory sign | Special behaviour or action Wear personal protective equipment |
| Green | Emergency sign Emergency exit sign First aid sign | Premises, doors, exits, escape routes, equipment |
| Green | No danger | Return to normal |
