JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://arquivo.devmedia.com.br/artigos/Joel_Rodrigues/CSS3/opacity/circulo2.png">

CSS

body{
  background-image: url('http://arquivo.devmedia.com.br/artigos/Joel_Rodrigues/CSS3/opacity/bg2.jpg');
}
img {
  opacity : 0.5
}