Note that the highlighted text in the headline and in one of the sub-headlines should be tested against the same version without highlighting, and another with a [red,blue,green] underline. I say this because this sort of highlight tends to test lower than underlines. But in your case it needs to be tested (if you haven't done already).
I found the "inverted" CSS style to be very annoying, since it looks almost exactly like text that I have selected (yes, I'm one of those compulsive text selectors).
