JSFiddle - React, Tailwind, and code Playground
by mmansion
HTML
<ul>
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
<li>Element X-2</li>
<li>Element X-1</li>
<li>Element X</li>
</ul>
CSS
li:nth-last-child(-n+3) {
color: red;
}