Recommended colour coding acc. to EN 60 204-1
Pushbutton actuators must be marked with 2 colours in accordance with table 2.
Colours for START/ON actuators should be WHITE, GREY or BLACK, preferably WHITE. GREEN is also permitted. RED must NOT be used.
RED must be used for actuators provided for stopping in an emergency situation and for switching off in an emergency situation. Colours for STOP/OFF actuators should be BLACK, GREY or WHITE, preferably BLACK. GREEN must NOT be used. RED is also permitted, however, it is recommended to avoid RED in the vicinity of components provided for emergency actions.
WHITE, GREY or BLACK are the preferred colours for pushbutton actuators with alternating START/ON and STOP/OFF function. RED, YELLOW or GREEN must not be
WHITE, GREY or BLACK are the preferred colours for pushbutton actuators initiating a function while being pressed and stopping the function when released (e.g. inching operations). RED, YELLOW or GREEN must not be used.
Resetting pushbuttons must be BLUE, WHITE, GREY or BLACK. In those cases where they also perform a STOP/OFF function, the preferred colours are WHITE, GREY or BLACK, with BLACK being the first choice. GREEN must NOT be used.
Table 2: Colours for pushbutton actuators and their meanings
Examples of application
Actuate in a dangerous or emergency situation.
Initiate emergency functions
Actuate if an abnormal condition occurs
Intervention to suppress an abnormal condition.
Intervention to resume an interrupted automatic sequence.
Actuate to initiate normal conditions
Actuate in a situation which requires a mandatory action
No special meaning defined
General initiation of functions except emergency stop (see note below)
NOTE: If an additional coding feature (e.g. shape, position, surface finish) is used for marking pushbutton actuators, the same colours – WHITE, GREY or BLACK – may also be used to identify different functions (e.g. WHITE for START/ON and STOP/OFF actuators).
2. Symbolic marking
3. Indicator lights and indicators
Indicator lights and indicators are used to provide the following information:
- Indication: To draw the operator's attention to a specific circumstance or to indicate that a specific action should be performed. The usual colours used for this type of application are RED, YELLOW, GREEN or BLUE.
- Confirmation: To confirm a command or condition, or to confirm the end of a change operation or transition time. Usually, BLUE and WHITE are used for this type of application; GREEN is permitted in some cases.
Indicator lights must have the colour coding according to table 3 unless otherwise agreed between the supplier and the purchaser. Other meanings deviating therefrom (refer to IEC 60073) may be assigned based on one of the following criteria:
- Safety of persons and environment
- Condition of the electrical equipment
Table 3: Colours of indicator lights and their meanings relating to the machine status
Immediate action to respond to a dangerous condition (e.g. by pressing emergency stop)
Abnormal condition; anticipated critical condition
Monitoring and/or intervention (e.g. by restoring the intended function)
Indication of a condition requiring operator intervention
Other conditions; may be used if there is uncertainty about the appropriateness of
RED, YELLOW, GREEN or BLUE