header { background: #000; color: #fff; }
header a { color: #fff; }
header .bg-white {
    background-color:   #000 !important;
}
.navbar-light .navbar-nav .nav-link:focus, .navbar-light .navbar-nav .nav-link:hover {
   color: #F00;
}

.navbar-light .navbar-nav .nav-link  {
   color: #fff;
}