JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://www.byui.edu/images/agriculture-life-sciences/flower.jpg" />

<div id="overlay"></div>

CSS

#overlay {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;

  background:black;
  background:rgba(0,0,0,0.8);

  filter:blur(4px);
  -o-filter:blur(4px);
  -ms-filter:blur(4px);
  -moz-filter:blur(4px);
  -webkit-filter:blur(4px);
}

body {
    background: #300000;
    background: linear-gradient(45deg, #300000, #000000, #300000, #000000);
}

img {
    height: 300px;
    width: auto;
    position: absolute;
    left: 100px;
    top: 100px;
}