JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<div class="wrap">
  <div class="container">
    <div class="row">
      <div class="col-md-8" style="background: #888;">
        Left content
      </div>
      <div class="col-md-4" style="background: #999;">
        Right content
      </div>
    </div>
  </div>
</div>

CSS

@media (min-width: 992px ) {
  .wrap { background: linear-gradient(to right, #888 0%, #888 50%, #999 50%, #999 100%); }
}