9.5 WCAG 2.2 Success Criterion 1.4.3 － Contrast (Minimum)

Design text and images so that they have a contrast ratio of at least 4.5:1 between the background and the foreground to make it easy to read. Logotypes are excluded in this case.

Before Rectification

The white text on the pink background has poor colour contrast (2.7:1), making it hard to read.

After Rectification

When greater colour contrast text (12.6:1) is used, the text is much easier to read. There are colour contrast checkers available online that can assist web developers to check the contrast of their webpages.

WCAG 2.2 Reference:

https://www.w3.org/WAI/WCAG22/Understanding/contrast-minimum