introduction-website/src/js/main.js

const secondaryColors = [
    // "rgb(240, 240, 240)",
    // "rgb(136, 139, 141)",
    "rgb(224, 231, 34)",
    "rgb(255, 173, 0)",
    "rgb(244,54,76)",
    // "rgb(219, 62, 177)",
    "rgb(250, 150, 250)",
    "rgb(250, 150, 150)",
    "rgb(242, 172, 185)",
    "rgb(0, 138, 216)",
    "rgb(0, 178, 169)",
    "rgb(88, 188, 64)",
    "rgb(173, 223, 179)"
];

let hue = 200;
const colorChangeInterval = 150;

function setRainbowColor() {
    const color = `hsl(${hue}, 60%, 60%)`;
    document.documentElement.style.setProperty('--secondary-color', color);
    hue = (hue + 1) % 360;
}

setRainbowColor();
setInterval(setRainbowColor, colorChangeInterval);