title: solid delta and inverted delta symbol in html
body: <p>I need to display the following two symbols in an email</p>
  
  <ol>
  <li>solid upward delta : something
  like ▲ </li>
  <li>solid downward delta : ▼</li>
  </ol>
  
  <p>But i cannot use extended-ascii set, because it causes problems in the unix system where my email templates are generated.</p>
  
  <p>Is there any html code, or any other code to accomplish this?</p>