Hi Lena Pleick,
Regarding the nav-bar issue; We suppose that you want to change the colour of your sub menu items and let it be unchanged even after scrolling. You may simply change the colour of your sub-menu item as follows;
ul.nav-menu ul a, .nav-menu ul ul a {
color: #dd992a;
}
I am afraid if it works or not.
We do not get what exactly you are looking for.Please provide the URL of your website so that we can find the appropriate solution for the related issue.
Regards,
Sushil