Hello,
Add the following code to Theme Options > Custom CSS
.et_b_header-menu.et_element-top-level .nav-sublist-dropdown .item-link:hover, .et_b_header-menu.et_element-top-level .item-design-dropdown .nav-sublist-dropdown ul > li > a:hover {
color: #c62727;
opacity: 1;
}
Regards