NOTE: The top row are all .png files, which means they're on transparent backgrounds--which means they're easily editable in any image editing program (pixlr is a good simple one, and doesn't require download), so you can put whatever color as a background your little heart desires by putting a colored layer beneath the image. And then I won't have to try guessing what colors people want the most.
I also put in a large image of the comic-style text in case anyone wants to play around with making their own stuff out of it.