table.ex tr th {
    text-align: left;
    padding: 5px 5px;
    background-color: #463073;
    color: #fff;
}

table.ex tr th.column {
	text-align: center;
    width: 50px;
}

table.ex tr td {
    padding: 5px 5px; 
}

table.ex tr td.column {
    border-right: 1px solid #ccc;	
}

table.ex tr.odd td {
    background-color: #eee;
}

.center {
    text-align: center;
}