title: Changing colors of an image dynamically
body: <p>I was wondering if it was possible if I had an image like: <img src="https://i.stack.imgur.com/NFtnh.gif" alt="enter image description here"></p>
  
  <p>I would be able to change certain parts of the images colors. For example if I wanted the bow green and the present red with yellow stripes, would I have to make a new image that had that or is there a way to program something (elegantly) along the lines of that? I'm just asking to see if its possible and if it is, what language would be best to do this?</p>
  
  <p>Keep in mind this would be a feature on a website.</p>