html, body {
    margin: 0;
    padding: 0;
    font-family: Helvetica, sans-serif;
    background-color: #800080;
}
p {
    margin: 0;
    text-align: center;
    font-size: 18px;
    background-color: #ff0000;
    padding-top: 40px;
    padding-bottom: 40px;
}
main {
    width: 100vw;
    height: 100vh;
    color: #0000aa;
}
.red {
    background-color: #ff0000;
}
.orange {
    background-color: #ffa500;
}
.yellow {
    background-color: #ffff00;
}
.green {
    background-color: #129a0d;
}
.blue {
    background-color: #0000ff;
}
.purple {
    background-color: #800080;
}