JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <header>
        <div id="headerout">
            <div id="header">
                <p>Content<p>
            </div>
        </div>
    </header>

    <div class="splitout white">
        <div class="split">
            <div class="content">
                <p>content</p>
            </div>
        </div>
    </div>

    <div class="splitout lightblue">
        <div class="split">
            <div class="content">
                <p>content</p>
            </div>
    </div>
</div>

<div class="splitout white">
    <div class="split">
        <div class="content">
            <p>content</p>
        </div>
    </div>
</div>

</div>
<div id="footerout">
<div id="footer">
    <p>foot</p>
</div>
</div>

CSS

* {
    margin: 0;
    padding: 0;
}
#container {
width: 100%;
}

#headerout {
width: 100%;
height: 100px;
background: #1240AB;
}

#header {
width: 1000px;
margin: auto;
}

.splitout {
width: 100%;
height: 225px;
}

.split {
width: 1000px;
margin: auto;
}

.content {
width: 750px;
margin: auto;
}

.white {background-color: #DDE3F0;}
.lightblue {background-color: #C9D5F0;}

#footerout {
width: 100%;
height: 30px;
background: #1240AB;
}

#footer {
width: 1000px;
margin-left: 25px;
}