let palettes = { purple: { color: "#8f00ff", lightColor: "#E8CDFE", }, orange: { color: "#FFF", lightColor: "#FF6100", }, }; window.addEventListener("load", () => { let shade = Math.random() > 0.5 ? "purple" : "orange"; color = palettes[shade]["color"]; lightColor = palettes[shade]["lightColor"]; document.documentElement.style.setProperty("--color", color); document.documentElement.style.setProperty("--light-color", lightColor); });