Safety Signage
The standard BS ISO 3864-1:2011 (that has superseded BS 5499-1:2002) specifies a system of geometric shapes and safety colours for use with the appropriate graphical symbols to produce safety signs. It is applicable to signs that provide information on the actions to be taken to prevent or reduce the risk of accidents, warn of the presence of a potential hazard and for dealing with certain emergencies including the identification of escape routes and the location of fire equipment. The general meanings assigned to geometric shapes, safety colours and contrast colours can be found in the table below:
Having chosen the sign colour and shape, you just need to choose the symbol that represents the intended message.