eg),
                                              lch(50% 100% 20deg),
                                              lch(50% 100% 40deg),
                                              lch(50% 100% 60deg),
                                              lch(50% 100% 80deg));
        }

        div.b {
            background-image: linear-gradient(to right in lch increasing hue,
                                              lch(50% 100% 80deg),
                                              lch(50% 100% 150deg)