JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  -webkit-box-shadow: 0px 0px 10px -1px #444444;
     -moz-box-shadow: 0px 0px 10px -1px #444444;
          box-shadow: 0px 0px 10px -1px #444444;
}