Ah ok, I understand.
Pls try adding this to your custom.css:
.hornav > ul > li:hover::after {opacity: 0;}
This disables the effect.
You can change the value of
opacity to make the effect less dark e.g. by setting it to
0.1 instead of 0.5 as it is by template.
For better understanding this is the whole css of the hover effect:
.hornav > ul > li:hover::after {
content: '';
position: fixed;
top: 0;
bottom: 0;
left: 0;
right: 0;
z-index: -1;
background-color: #000;
opacity: .5;
visibility: visible;
}
So you can also change the background-color to make it brighter e.g. to a light grey tone.
Hope this helps?
Regards
Oliver