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.
- Who can use? – This is my favourite colour contrast checker.
- Convert RGB colours to Hex / HTML for use in colour contrast checkers
- Convert HTML (HEX) to RGB – Office products cannot use HTML colour codes, so this site can be used to change them if you need to.
- “Colorsafe” – Accessible colour generator – If you want a colour to go with another, this site can help you to find an accessible colour.
- Guest blog: How to check your brand’s colour contrast for accessibility – a post I wrote for the AbilityNet website.
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.
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.
These web pages demonstrate all the accessible colour choices that can be used for: