.right-col {

background-color: transparent !important;

}

#actualContent {
    background: url('http://portesouvertes.epfl.ch/files/content/sites/portesouvertes/files/img/server/my-server.png') no-repeat;
        background-image: url(../images/Logo_PO_Pacman.png);
        background-repeat: no-repeat;
        background-position: 70% 20%;
}