body {
    margin: 0;
    padding: 0;
    background-color: #454545;
}
.centerme {   
    width: 906px;   
    height: 630px;   
    position: absolute;   
    left: 50%;   
    top: 50%;   
    margin-left: -453px;   
    margin-top: -315px;   
}