Cards look too dark

We have been using this for a while and at some point the main page which shows all the cards now looks like all the cards are in shadow. They work fine if you click on them, but they look dark like they are disabled. Appears this way on multiple browsers and on my desktop and tablet. I have changed multiple settings and have tried with theme styles disabled and enabled, but nothing has worked.

The page I need help with: [log in to see the link]