MediaWiki:Common.css

/* CSS placed here will be applied to all skins */

body, div#mw-page-base{
background: black;
}

a {background: white;
padding-left: 4px; 
padding-right: 4px;
}

a.external{color:#0B00A0!important;}

h1, h2, h3, h4 { border: none; }