.center {
  display: block;
  margin: 0 auto;
}

th{
  color:white;
  background:DarkBlue;
}

tr:nth-child(odd) {background: #CCC}
tr:nth-child(even) {background: #FFF}

tr:hover {background-color:Moccasin;}
td {text-align: center;}

body {
  background-color:lightblue;
}