h1 {
    margin: 0;
}

h2 {
    text-align: center;
    margin: 10px
}

/*
input[id=hue]::-moz-range-track {
    background: linear-gradient(to right,
            hsl(0, 40%, 75%),
            hsl(60, 40%, 75%),
            hsl(120, 40%, 75%),
            hsl(180, 40%, 75%),
            hsl(240, 40%, 75%),
            hsl(300, 40%, 75%),
            hsl(360, 40%, 75%))
}*/