Maybe it's just late at night, but how does this work? I understand the words "invisible separator", but for lack of better phrasing, I don't see an invisible separator.
Between the R and E of red there's some extra character.
My font shows it as a missing character box.
I'm guessing that it just breaks the 'red' into a value which is interpreted as whatever the hex is. (See the chuck norris links posted in this thread).
