JSFiddle - React, Tailwind, and code Playground

HTML

<div class="list">
  <div class="item active"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

CSS

.item {
  display: inline-block;
  margin: 10px;
  width: 100px;
  height: 100px;
  background-color: blue;
}

.active {
  background-color: red;
}