JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div{
  height: 256px;
  width: 256px;
  background: rgba(0, 0, 0, 1);
  transition: 1s linear;
}

div:hover{
  height: 256px;
  width: 256px;
  background: rgba(0, 0, 0, 0.1);
  transition: 1s linear;
}