Hover color mobile menu

Site URL: https://pockimals.com

I can't seem to find where to change the hover color on my mobile menu. I can see that I have a hover color (it's almost the same color as the menu type), but where do I edit it?  I tried looking for code found found this thread, but it's not for the mobile menu.

Is there a way to search for styles that I'm not aware of? There are SO many (which is great for design control), but it is really hard to know what goes to what.

Add this to Design > Custom CSS

nav.header-menu-nav-list *:hover {
    color: red !important;
}