Hello,

Actually that hover effect only available for the shop page categories. You can not use that hover effect on other menu items or information boxes.

You can check the screenshot for clarification: https://jmp.sh/JmLuwUe

So you can set black background for your shop page and the hover will shown same as demo. As currently you have hover effect of blue color in shop page categories. So you can change to green or some other color if you want the same look as demo.

Best Regards.