JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container1">
 Some text and other divs go here.  This is where the background will be 
 an image.  
 </div>
 <div class="container2">
 Some text will also here along with divs.  This is where I want to use the 
 red background.
 </div>

CSS

.container1 {
    background-image: url('http://jsfiddle.net/img/top-bg.png');
    width:100%;
}
.container2 {
    width: 100%;
    background-color: #990000;
}

/* if there is padding/margin */
html, body {
    padding:0;
    margin:0;
}
.container1, .container2 {
    margin:0;
}