body{
    background-color: #212121;
}

.md-nav--secondary .md-nav__title {
    background: #212121;
    box-shadow: 0 0 0.4rem 0.4rem #212121;
}
.md-nav--primary .md-nav__title {
    background: #212121;
    box-shadow: 0 0 0.4rem 0.4rem #212121;
}