JSFiddle - React, Tailwind, and code Playground

HTML

<p class="zentriert"> zentriert<br /><br /><br /><br /> :-)</p>

CSS

* {
  margin: 0;
  padding: 0;
}
html, body {
  width: 100%; 
  height: 100%;
}
body {
  font-size: 150%;
  font-family: sans-serif;
  display: -webkit-flex;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;  
  -webkit-align-items: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;  
}

.zentriert {
  text-align: center;
  background-color: #A6F4FF;
  color: #464646;
  width: 100%;
}