Make sure to enable Contrast within Sa11y's settings.

jQuery contrast plugin was created by jasonday. To prevent false positives, a simple condition was added to exclude any elements whose width and height is less than 1px and contains overflow:hidden;. Some contrast plugins falsely indicate visually hidden text for screenreaders as a contrast fail.

Tooltips will indicate whether it's large or normal size text, including the snippet of text that fails.

Example 1 - Normal text

This colour fails at normal size.

Example 2 - Large text

This colour also fails at a large size.

Example 3 - Form input

Input's text color is too low.

Example 4 - Warning

Warnings for text that uses CSS backgrounds.

Text on background image requires manual review