Ensure sufficient contrast
For people with visual disabilities and good readability for all
To ensure that content is easily recognisable, make sure there is sufficient contrast between the foreground and background colours and between the text and background colours.
This reduces barriers, especially for people with visual impairments. But it also improves readability for everyone. Eyes tire less quickly. Content remains easy to read even in poor lighting conditions.
Helpful information & tools to implement this:
- The problem is well illustrated in “Thinking of everyone? – Contrast” (opens in new tab) – a campaign on digital accessibility on the HessenHub blog (Hessen Digital University Teaching Network).
- Check the contrast ratio:
- with the Colour Contrast Analyser (CCA):
Screencast instructions for the CCA (opens in new tab) - with the contrast calculator on leserlich.info (opens in new tab)
- with the Colour Contrast Analyser (CCA):
- Checklist of colours and contrasts (opens in new tab) from the State Competence Centre for Accessible IT in Hessen
