JSFiddle - React, Tailwind, and code Playground

HTML

<div id="regForm"><button>Hello world</button></div>

CSS

#regForm button{
    clear:both;
    margin-left:150px;
    width:150px;
    height:50px;
    background:#2E9AFE no-repeat;
    text-align:center;
    line-height:32px;
    color:#FFFFFF;
    font-size:20px;
    font-weight:bold;
}

#regForm button:hover{
    background-color:#FFC;
}