The IDE formatted comments in the source text bold and blue.
This I wanted to chance in non-bold and green (like Delphi).
I am quite sure that will work....
Not sure though were you may have gone wrong.
When you have your colors back (and backup your editor options xml file).
Go back to the dialog.
Choose the "comment" from the tree view.
And only change the foreground color (and the bold checkbox).
Touch nothing else.
Now there are no colors at all.
Have you disabled "use highlight" at the top?
Also, in the editor, right click, and check in the context menu, that the highlighter is pascal.