title: Is it possible to turn an entire webpage to grayscale using CSS?
body: <p>I would like to turn an entire website to grayscale. Of course, I can manually edit the CSS and adjust every single <code>color</code>, <code>background-color</code> &amp; co. property, and I can adjust every single image in Photoshop.</p>
  
  <p>But is there an easier way, e.g. by using pure CSS?</p>
  
  <p>E.g., something such as putting a 100% x 100% overlay <code>div</code> on top of your site that turns every color to grayscale?</p>
  
  <p>Any hints?</p>