As with the text in the one above, the color here was just a "sketch" to show what I had in mind for the background - separating it from the foreground with one (or two) simple colors, plus using the color to create a ragged border. Another change from the client came back on this one - I had originally written "Curses! Foiled again!" in the villain's speech balloon, but an alert teacher must have vetoed that. Whether out of personal sensitivity or a finely honed awareness of the sensitivity of parents, we can only speculate.
Well that's all I've got, now go get 'em, team!