tiggerrr

You cannot believe how stupid I was.  I had a typo and I kept cutting and pasting it without noticing. (Tip: Don't try to fix your new site at 3am).  I copied and pasted your code and it worked.  Thank you very much for answering me, even though this was a total user error.  It's working fine now.  

By putting the colour in to the html code...
<span style="color:green"><strong>Group name</strong></span>  

The above works for group formatting, guaranteed...

Want more assistance? Post a picture of what you actually have in your group formatting code; also make sure you don't have an app/plugin installed that is also manipulating this.