Using Colours Accessibly

Why does colour contrast matter?

More than two million people in the UK live with a visual impairment.  Many more report having difficulties with their site.  4.5% of the the British population is colour blind.

When we use colours, the contrast between two colours needs to be enough so that people can tell the difference.  For example, for some white text on a yellow background can be very hard to read.

The above article gives a good overview about colour contrast.

Useful Links

Microsoft Office “Standard Colours” – colour contrast accessibility matrix

This matrix lists the standard colours available in the colour palette in Office products like Word, PowerPoint and Excel. It can be used to look up which colours are accessible when used together.

University of Southampton brand – colour contrast accessibility matrix

This matrix lists all the colours in the University of Southampton brand and can be used to look up which colours are accessible when used together.

University of Southampton brand – colour contrast examples

These web pages demonstrate all the accessible colour choices that can be used for: