JSFiddle - React, Tailwind, and code Playground

HTML

<div id=d1>
<div id=d2>
Это блок
</div>
</div>

CSS

#d1  {
  position: absolute;
  width: 100vw;
  height: 100vh;
  background: url('http://www.russia-on.ru/wp-content/uploads/2019/08/Sankt-PeterburgBolshaya-yubov-na-Dvorcovoj-ploshchadi.jpg');
}

#d2  {
  position: absolute;
  width: 100px;
  height: 200px;
  left: 150px;
  top: 100px;
  box-shadow: 0 0 0 5000px rgba(0,0,128,.5)
}