JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li></li>
  <li></li>
  <li></li>
  <li></li>
  <li></li>
  <li></li>
</ul>

CSS

UL {
  margin: 0;
  padding: 0;
  list-style: none;
}

LI {
  display: inline-block;
  width: 50px;
  height: 50px;
  background: cornflowerblue;
}

LI:nth-last-child(1) {
  background: firebrick;
}