JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
        <div class="b-header">s</div>
        </div>

CSS

.b-header {
    height: 300px;
    background-image: url('https://www.w3schools.com/w3css/img_fjords.jpg');
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-color: #464646;
}