had to add a tint to a picture on css code example

Example: had to add a tint to a picture on css

.hero-image:after {
  	position: absolute;
  	height: 100%;
  	width: 100%;
  	background-color: rgba(0,0,0,.5);
  	top: 0;
  	left: 0;
  	display: block;
  	content: "";
}