title: Colored characters in HTML title
body: <p>Using Firefox I stumbled upon a page with differently colored characters in the title. How to insert colored characters into a HTML <code>&lt;title&gt;</code> tag? What is this standard called?</p>
  
  <p>Update:
  Apparently it has something to do with the (UTF?) heart emojis characters. Here is the screenshot:</p>
  
  <p><a href="https://i.stack.imgur.com/orvqG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/orvqG.png" alt="Different colors"></a></p>
  
  <p>Instructions on how to insert those can be found <a href="http://www.wikihow.com/Make-a-Heart-on-Facebook" rel="nofollow noreferrer">here</a>. I made a test Facebook post and it really renders hearts of different colors in Firefox title.</p>