As a (night class) student, I've had a couple of instructors say, one should NOT have highlights or whites that blend into the border (if you have a border). whites should always be burned in to a light grey (gray?) so as the border is always distinguishable from the print.
I do this in class as the instructor wants it that way (gotta keep those marks up ya know), and that there is an exception to every "rule". So I put it to you APUG people: what is your preference? Edge of the border always discernible or can "whites" flow into the border?
perhaps I should take a class in spelling