What does this mean?

To comply with WCAG AA, the colour of text must sufficiently contrast with its background color, so that people with moderate visual impairments can read it.

The contrast ratio must be at least 4.5:1 for body text, and 3:1 for large text.

A much more demanding version of this check (1.4.6) exists for WCAG AAA. Ignoring an issue in this check will also ignore it in that check, and vice versa.

81.9% done

How close this website is to fixing this issue.

Example use Found on page Occurrences
Cambridge Science Festival

Contrast is 2.44, needs to be 4.5

Cambridge Vice-Chancellor, Professor Stephen J Toope

Contrast is 4.48, needs to be 4.5

Professor Stephen Hawking

Contrast is 2.83, needs to be 4.5

Cambridge Digital Humanities Project

Contrast is 2.83, needs to be 3

Alfredo Carpineti

Contrast is 3.86, needs to be 4.5


Contrast is 3.55, needs to be 4.5

By Louise Walsh

Contrast is 4.05, needs to be 4.5

Social Decision-Making Lab

Contrast is 3.09, needs to be 4.5

Go Viral! is a new game developed in partnership between the University of Cambridge and the UK Government. The gam ...

Contrast is 2.66, needs to be 3

Story: Fred Lewsey

Contrast is 3.93, needs to be 4.5

56 distinct issues were found in the sample of 125 web pages. Only the first 10 issues are shown here.
More results from University of Cambridge