Thank you all for the info. I had wondered if there was a connection of the natural colors of the rainbow and the colors choosen or seen for the Chakras.
On Maui here there are regular rainbows and the visible part for me is top red and bottom purple. Since they followed a natural spectrum I can't see how it would follow in a opposite pattern for the energy centers.
But as Allen pointed out it is probably arbitrary and then just accepted by everyone.
I started paying attention to color sequence after learning about the constructive cycle of the elements and how that worked. You see the Tibetan Prayer flags and the sequencing of colors they use. So I suppose I ask "why did they do it that way?" It has to mean something.
