JSFiddle - React, Tailwind, and code Playground

HTML

<div class=q1>
    <div class=q2>text</div>
</div>

CSS

.q1 {
    background-color:green;
    position:fixed;
    opacity:0.6;
    width:100%;
    height:100%;
   top:0;
    left:0;
}
.q2 {
  position:relative;
    background-color:black;
        color:white;
    height: 70px;
    width:115px;
    padding:10px;
margin:25% auto;
}