Thread Prefixes: Remove Trailing Space and Style?

[qcforcacct]

I recently set up thread prefixes and used an inline <style> tag to change the color of the text and background in the "rich text" field when creating the prefix. It seems vB automatically adds a space following the rich text input. This works fine when no background color is specified, but when there is a background color it also colors this trailing space which looks terrible. Any ideas on how to prevent vB from adding the trailing space or preventing it from applying the specified style to it?