JSFiddle - React, Tailwind, and code Playground

HTML

<div class="results" style="background-color:Red;width:100px;height:100px;">
</div>

<ul class="colors-list">
    <li>Red</li>
    <li>Blue</li>
    <li>#ffee99</li>
</ul>

JavaScript

$('.colors-list li').click(function(e) {
    var color = $(this).text();
    $('.results').css('background-color', color);
});