1.4.4 Resize text
Make it easier for users to see and hear content including separating foreground from background.

About

Enable users to resize the text up to 200% without affecting the content or functionality. So, that people with mild visual impairments can access the content without using assistive technologies.

Example:

Before Rectification

image with a poor foreground and background color contrast

After Rectification

image with a sufficient foreground and background color contrast