body {
    width: 50%;
    margin: 0 auto;
}

table {
    border-collapse: collapse;
    margin-bottom: 200px;
}
    
p {
    font-size: 150%;
    font-weight: bold;
    text-align: center;
}

.table1 td {
    border: 5px solid black;
    width: 100px;
    height: 100px;
    background-color: khaki;
}

.table1 td[colspan] {
    background-color: darkorchid;
}

.table2 td {
    border: 5px solid black;
    width: 100px;
    height: 100px;
}

.table2 tr:nth-child(even) {
    background-color: red;
}

.table2 td:nth-child(even) {
    background-color: green;
}

.table2 tr:nth-child(3) td:nth-child(4) {
    background-color: blue;
}