header {
    background-color: #081f5c;
    color:#ffff;
    text-align:center;
}
body{
    background-color: #93a7de;
    text-align: center;
}

img {
    display:block;
    margin-left: auto;
    margin-right: auto;
}
table, th,td {
    width: auto; 
    margin-left: auto;
    margin-right: auto;
    border: 2px solid;
    border-collapse: collapse;
    text-align: center;
    border-color:#6483d7;
    padding-left: 10px;
    padding-right: 7px;
}
thead {
    background-color: #71a4ef;
    color: #d0e3ff;
    text-align: center;
}

tbody {
    background-color: #d0e3ff;
    color:  #266eda;
    text-align: left;
}