JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>Child 1</li>
    <li>Child 2</li>
    <li>Child 3</li>
    <li>Child 4</li>
    <li>Child 5</li>
</ul>

CSS

li:nth-child(3){
  background-color: #FF6347;
}