JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
<div class="header">
    &nbsp;
</div>
    &nbsp;
</div>

CSS

div.wrap
{
    width:1024px;
    margin:0 auto;
    height:100px;
    background-color:Purple;
}
div.header
{
    height:100%;
    width:990px;
    border-right:20px solid Gray;
    background-color:Purple;
}