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.

30.7% done

How close this website is to fixing this issue.

Example use Found on page Occurrences
cookies page.

Contrast is 3.59, needs to be 4.5

Organ Donation

Contrast is 4.43, needs to be 4.5

Organ Donation and Transplantation

Contrast is 4.11, needs to be 4.5

Share our messages and materials and help to save lives!

Contrast is 3.99, needs to be 4.5

251 distinct issues were found in the sample of 125 web pages.
More results from NHS Blood & Transplant