body { background-color: #cb011a; } a:link { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; font-weight: bold; color: #FFFFFF; } a:visited { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; font-weight: bold; color: #FFFFFF; } body{ margin: 0px; } #contenedor{ position: absolute; left: 50%; top: 50%; width: 250px; height: 100px; margin-left: -125px; /*- width/2*/ margin-top: -50px; /*- height /2*/ background-color:#cb011a; }