*smirks* Look at all the mistakes in the cartoon because the animators couldn't tell them apart. I think it's easier to remember that the only difference is bandanna color. To me, more differences means more they could screw up, but that's my Raph-like cynism talking. Besides, everyone draws them differently anyway, so I don't really give a damn what their official costume is.
So, you're telling my that no comic book artist EVER took license when drawing characters. That they look EXACTLY the same from book to book, even panel to panel?