Accessibility issues with hidden resources

Hi,

Our Digital Accessibility team has flagged to us that some users have difficulties reading hidden resources in Moodle (current version: MOODLE_311 latest).

I believe the issue they are having is largely the same as this one: Accessibility issues with hidden resources in Essential theme. However, in this case it is for the Adaptable theme rather than Essential.

The Digital Accessibility team want hidden resources to still be compliant with WCAG 2.1 AA requirements.

In our case I can see that when a section is hidden, an opacity of 0.5 is applied and when a resource/activity is hidden, then the colour #999 is applied:

Using contrast checkers I found that a colour of #757575 for hidden resources/activities and an opacity of 0.75 for hidden sections would pass the WCAG 2.1 AA requirements.

Do you think some changes (either the ones suggested above or others that you might find more suitable) could be applied to hidden resources so that they would become compliant with WCAG 2.1 AA requirements?

Thank you.