Как изменить цвет PNG изображения с помощью CSS

Source Code: (back to article)

<!DOCTYPE html>
<html>
  <head>
    <title>Заголовок документа</title>
    <style>
      body {
      background-color:#03030a;
      min-width: 800px;
      min-height: 400px
      }
      img {
      width:20%;
      float:left; 
      margin:0;
      }
      /*Filter styles*/
      .saturate { 
      filter: saturate(3); 
      -webkit-filter: saturate(3);
      }
      .grayscale {
      filter: grayscale(100%);
      -webkit-filter: grayscale(100%); 
      }
      .contrast { 
      filter: contrast(160%); 
      -webkit-filter: contrast(160%); 
      }
      .brightness {
      filter: brightness(0.25); 
      -webkit-filter:brightness(0.25);
      }
      .blur { 
      filter: blur(3px);
      -webkit-filter: blur(3px); 
      }
      .invert { 
      filter: invert(100%); 
      -webkit-filter: invert(100%); 
      }
      .sepia { 
      filter: sepia(100%); 
      -webkit-filter: sepia(100%);
      }
      .huerotate { 
      filter: hue-rotate(180deg); 
      -webkit-filter: hue-rotate(180deg); 
      }
      .opacity { 
      filter: opacity(50%);
      -webkit-filter: opacity(50%);
      }
    </style>
  </head>
  <body>
    <h2>Измените цвет PNG изображения</h2>
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="original">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="saturate" class="saturate">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="grayscale" class="grayscale">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="contrast" class="contrast">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="brightness" class="brightness">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="blur" class="blur">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="invert" class="invert">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="sepia" class="sepia">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="huerotate" class="huerotate">
    <img alt="Mona Lisa" src="http://i.stack.imgur.com/OyP0g.jpg" title="opacity" class="opacity">
  </body>
</html>