JSFiddle - React, Tailwind, and code Playground

HTML

<div class="header">
    <div class="logo">Logo</div>
</div>

CSS

.header {
    width: 100%
    height: 500px;
    background-color:rgba(0,0,0,.5);
}
.logo {
    display: inline-block;
    width: 100px;
    height: 100px;
    background-color: #000;
    color: #fff;
}