section#background div {
    padding: 5px 15px;
    width: 50px;
    text-align: center;
    display: inline-flex;
}
div.hex {
    background-color: #de1025;
}
div.rgb {
    background-color: rgba(0%,0%,100%,0.5);
}
div.hsl {
    background-color: hsla(120,100%,30%,0.5);
}
div.color-name {
    background-color: grey;
}