JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#"><span class="button">BUY NOW</span></a>

CSS

body {
  background-color: #264D38;
 }

.button {
    display: inline-block;
    width: 150px;
    padding: 26px 0;
    border-radius: 2px;
    margin-top: 20px;
    margin-bottom: 20px;
    background-color: rgba( 137, 137, 137, 0.4 );
    color: #fff;
    font-weight: bold;
    text-align: center;
}
.button:hover {
	background-color: #000000;
}