title: Identify Special Characters
body: <p>I need to identify cells that have certain special characters (example: !,.=]\')  and mark them with a color.</p>
  
  <p>The column can only contain numbers (0-9), letters (a-z), as caps (A-Z) and hyphen (-).</p>
  
  <p>Example:<a href="https://i.stack.imgur.com/fjAuF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fjAuF.png" alt="enter image description here"></a></p>