JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li id="teste"></li>
</ul>

CSS

ul{
	list-style: none;
    background-color:black;
    height: 70px;
    transition-duration: 0.7s;
    width: 50px;
}

ul:hover{
    background-color: blue;
}
}