That's a fantastic example NewChapter! What the hell did things like that have to do with prosperity of mankind? Now if you asked a religious moral philosopher whether it would've been immoral for them NOT to wear blue, they would probably say "no, that wouldn't be immoral" because that act wasn't immoral, but they would probably chime in "But disobeying god's mandate was immoral", and that introduces a third and very important element to morality. Control. Obedience to those of the higher caste was almost always a moral mandate in countless religious cultures. The preist said it, you have to do it, it's wrong not to. The JWs operate with this mentality to an extreme. Their greatest moral imperitive is to obey the society.
I think those are the three aspects of "morality", control, identification, and the well being of concious things. But only the last one is of any importance in a post enlightenment society. We don't need blind obedience to authority figures, and identification is more harmful than anything (seeing as how that is what creates prejudice and bigotry). The last one however doesn't come from some innate understanding. It's complex, multifaceted, and there are no easy answers. Attempting to pigeon hole it with something as simple as "the golden rule" doesn't work, because cultures want different things out of life. We don't just "get it" in our "heart of hearts" or something lame like that, but with diligent study, meditation, and contemplation we've managed to work towards it for thousands of years. It's not because we have progressively stopped ignoring the unicorn in our heart telling us right from wrong, it's because great men and women dedicate their lives to civil rights movements, ethical philosophy, conciousness raising and other means of working towards the benefit of everyone rather than the benefit of their singular group. That's what we need more of, we don't need more people consulting bronze age barbarians and mystics and demanding we follow their tribal council.