International Standards and Conformity Assessment for all electrical, electronic and related technologies
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Drafting IEC publications

 

 

Colour recommendations

Use colour in figures, tables or text when it will help the user of the document.

 

Do not use colour for purely aesthetic purposes. Before deciding to use colour to maximise readability, consider using grey scale instead.

 

Keep the number of colours to a minimum. Choose colours that are clearly distinguishable from each other. Avoid the use of cross-hatching to produce lighter effects – solid colours are preferred.


When choosing the colours, consider that users of IEC documents print them using varying qualities and types of printers.

 

RGB colour scheme values (primary and secondary colours) as used in the IEC Graphic Charter:

 

Primary colours

colour circle - primary colours

Red

 

Red 255
Green 0

Blue 0

Green

 

Red 0
Green 255

Blue 0

Blue

 

Red 0
Green 0

Blue 255

Secondary colours

colour circle - secondary colours

Yellow

 

Red 255
Green 255
Blue 0

Cyan

 

Red 0
Green 255
Blue 255

Magenta

 

Red 255
Green 0
Blue 255

 

 

When choosing to use primary and secondary colours together, we recommend selecting complementary colours. These are any two colours which are directly opposite each other on the colour wheel, such as red and cyan or green and magenta. These opposing colours will create maximum contrast and improve legibility in both electronic and printed versions of your document.

 

 

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