nav.bg-light {
    background-color: black !important;
}

nav.bg-light .navbar-nav .nav-link,
nav.bg-light .navbar-nav .nav-link:focus,
nav.bg-light .navbar-nav .show .nav-link {
    color: white;
}

.navbar-toggler {
    background-color: white;
    border: 3px solid black !important;
}