ThanQ baker!
There are many people who still worships planets as Gods, or, the planets rather are the Gods. Anyways, The Brotherhood of Saturn, or few similar names as they go by. Those who has been worshipping Saturn for hundreds and hundreds of years in generations..
Black robes (judges).
Black square on head when you graduate.
(Because of the black 'square' on Saturn).
High Priests in black.
Wedding-RING. (Saturn rings).
Ear-RING. (Saturn rings).
Old monks used to shave their heads so they had a ring of hair around their head. (Saturn rings).
And much more. And all is connected.
Anyways it got me thinking, purple?
Well there is a theory there was a time that Saturn actually acted as our sun. And at that time it gave a whole different light upon our planet, you know the red and blue freq's.
That makes things grow much better, faster and so on. Resulting in GIANT growth. Giant people. And much more.
Take a look at someone who wants to grow weed today for example, many uses just this same light as Saturn gave off. Same frequencies. Because it grows more, better, and so on.
So perhaps this is why they are the purple people? Would need to dig more I just wrote from the top of my head when I saw the picture in your post.