JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
<div>
  <p>A</p>
  <hr>
  <p>B</p>
  <hr>
  <p>C</p>
  <p>
  test
  </p>
</div>

CSS

hr {
  background: black;
}


p {
  color: green;
}