HTML Element Style How to - Create CSS image overlay with color and transparency

Question

We would like to know how to create CSS image overlay with color and transparency.

Answer


<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
.image-holder {<!-- w  w w .  ja  v  a 2s . c o m-->
  display: inline-block;
  position: relative;
}

.image-holder:after {
  content: '';
  top: 0;
  left: 0;
  z-index: 10;
  width: 100%;
  height: 100%;
  display: block;
  position: absolute;
  background: blue;
  opacity: 0.1;
}

.image-holder:hover:after {
  opacity: 0;
}
</style>
</head>
<body>
  <div class="image-holder">
    <img src="http://www.java2s.com/style/download.png" />
  </div>
</body>
</html>

The code above is rendered as follows: