JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="colorSet">
    <li>Yellow</li>
    <li>Orange</li>
    <li>Red</li>
</ul>

CSS

body {
    background-color:#fff;
}

ul li {
    cursor:pointer;
}

JavaScript

window.onload = function(){
    var ul = document.getElementById('colorSet');
    ul.onclick = function(e){
        var evt = e || window.event;
        var target = evt.target || evt.srcElement;
        document.body.style.backgroundColor = target.innerHTML;
    };
};