table {
    background-color: silver;
}

th,td {
    border: 2px inset;
}

tr.lab {
    color: purple
}

tr.exam {
    color: red
}

tr.final {
    color: red;
    font-style: italic
}

tr.break {
    font-style: italic
}

tr.extra {
    color: green
}

.book1 {
    color: darkblue
}

.book2 {
    color: brown
}

.book3 {
    color: orange
}