JSFiddle - React, Tailwind, and code Playground

HTML

<div class="bloc">
  <div class="row">row1</div>
  <div class="row">row2</div>
  <div class="row">row3</div>
</div>

CSS

.bloc {
  background:red;
}

.row {
	width: 90%;
  margin: 0 auto;
  background:blue;
}