JSFiddle - React, Tailwind, and code Playground

HTML

<li class="no-blur">noblur</li>
<li class="blur">blur</li>

CSS

li.no-blur{
    background:url('//placehold.it/10x10') repeat center center #000;
}

li.blur{
    background:url('//placehold.it/10x10') repeat center center #000;
      -webkit-filter: blur(5px);
  -moz-filter: blur(5px);
  -o-filter: blur(5px);
  -ms-filter: blur(5px);
  filter: blur(5px);
}