box-shadow, blur

http://stackoverflow.com/questions/28384582/how-to-fade-out-blur-divs-borders-with-css

by Ram Tobolski

HTML

<div></div>

CSS

div {
  width: 100px;
  height: 100px;
  border: 2px solid #141414;
  box-shadow: 0 0 5px 5px #141414;
}