Depends on the complexity and what you'd need done; my baseline for services is $125/hr; any developer can do it, it's just HTML and JavaScript that'd be needed.
The style editor edits the style formatting and coloring; all of which use HEX codes and colors are defined in multiple different areas.
You'll find that UBBWiki covers most of the aspects of running a forum and utilizing the Control Panel, I personally wrote the majority of content there from content posted since the 90's...