JSFiddle - React, Tailwind, and code Playground

HTML

<div class="⇪"></div>
<div class="❈"></div>
<div class="☃"></div>

CSS

div {
  width: 100px;
  height: 100px;
}

.⇪ {
  background: #999;
}

.❈ {
  background: #0f05;
}
.☃ {
  background: #00f5;
}