body {
    background-color: red;
    text-align: center;
    color: #fff;
}

h2 {
    background-color: rgba(0, 0, 0, .5);
}

p {
    background-color: rgba(0, 0, 0, .8);
    height: 100px;
}

p:last-child {
    background-color: rgba(0, 0, 0, .2);
}