International Standards and Conformity Assessment for all electrical, electronic and related technologies
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Colour in publications

For most documents produced by the IEC, the use of black and white is sufficient. Colours in figures, tables or text shall only be used where they facilitate the use of the document. They have to serve a purpose in helping the user to easily understand and interpret the data and explanations given.

The use of colour for purely aesthetic purposes is not permitted.


graph with colours graph with greyscale
Example 1: Use of colour lines to distinguish separate curves in a graph
Example 2: The same information can be expressed in black and white using different line types


Please follow our grey scale and colour recommendations to ensure maximum readability.


You will find further information on the use of colour in IEC documents in the Administrative Circular AC/24/2009 (published on 24.7.2009).



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