title: Darkening an image with CSS (In any shape)
body: <p>So I have seen quite a few ways to darken images with CSS, including ones with rounded corners, but my problem is different.</p>
  
  <p>Let's say I have an .png image that looks like a little dog (just go with it, I don't have any good examples), when I place it on my page, I give it dimensions of 100 x 100.</p>
  
  <p>But I can't just overlay something on it, or tint the entire image, as it will cause the background of the dog to be tinted as well, which looks ugly.</p>
  
  <p>Is it possible to tint an image of arbitrary shape with CSS?</p>
  
  <p>(I'm assuming you understand my point, and useless code is not necessary)</p>
  
  <p>Thanks!</p>