JSFiddle - React, Tailwind, and code Playground

HTML

<div id="divOne"></div>

CSS

body {
    background-color:#2980b9;
}
#divOne {
    height:100px;
    width:75%;
    background-color:#1abc9c;
    margin:auto;
    text-align:center;
    border-radius:20px;
}