JSFiddle - React, Tailwind, and code Playground

HTML

<div id="thisdiv">Content</div>

CSS

#thisdiv { height: 200px;
    width: 200px;
    background-color: #600;
    transition: 2s;
    -moz-transition: 2s;
    -webkit-transition: 2s; }
#thisdiv:hover {
    background-color: #006;
    transition: 2s;
    -moz-transition: 2s;
    -webkit-transition: 2s;}