MediaWiki:Common.css

.navbar-light .navbar-brand,.navbar-light .navbar-brand:focus,.navbar-light .navbar-brand:hover {
    color: white
}
.bg-light{
background:#1b1b1f !important;
}
#maincontentwrapper {
    overflow-wrap: break-word;
    background: #212126;
    border: 1px solid black;
    border-radius:1.4rem;
    color: white !important;
}