Main menu – changes color when scrolling down

Hey frederiksandgrav,
Try this code in the General Styling > Quick CSS field:

.header_color .av-subnav-menu a:hover, .header_color .main_menu ul:first-child > li a:hover, .header_color .main_menu ul:first-child > li.current-menu-item > a, .header_color .main_menu ul:first-child > li.current_page_item > a, .header_color .main_menu ul:first-child > li.active-parent-item > a {
    color: #fff!important; 
}
.header_color .sub_menu>ul>li>a, .header_color .sub_menu>div>ul>li>a, .header_color .main_menu ul:first-child > li > a, #top .header_color .sub_menu li ul a {
    color: #fff!important; 
}

Best regards,
Mike