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

.bg-dark .nav>li>a:focus, .bg-dark .nav>li>a:hover, .graph-svg-tip .nav>li>a:focus, .graph-svg-tip .nav>li>a:hover {
    background-color: #474747 !important;
}

.bg-dark .nav>li.active>a, .bg-dark .nav>li:focus>a, .bg-dark .nav>li:hover>a, .graph-svg-tip .nav>li.active>a, .graph-svg-tip .nav>li:focus>a, .graph-svg-tip .nav>li:hover>a {
    background-color: #474747 !important;
}