JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <img src="https://www.w3schools.com/howto/img_avatar2.png" alt="avatar" />
  </div>
  <img src="https://www.w3schools.com/howto/img_avatar2.png" alt="avatar" />
  <div class="compare">
    hello world
  </div>

CSS

#container {
  background-color:rgba(0,0,0, 0.8);
  width:80%;
  margin:0 auto;
}

img, .compare {
  width:80%;
  margin:0 auto;
}

.compare {
  background-color:yellowgreen;
}