I know for a fact that the right one is europa gold, because right after the event I bought it off a vendor, logged, and haven't played the game for years,
I log in and find out about this 'new' dye called "Aura Of Amber Pigment", this dye didn't exist when I bought the sash years ago, so yes the Hue thing
you are using is mixed up, you indeed purchased a true Europa Gold Britannian sash for a cheap price!, I literally paid about that much for mine when it
was new so you got a good deal, the Atlantic hoarders xfered tons of them to Atlantic, chopped them up and you usually don't find it other than crafted
or as cloth pieces, 1 cloth of Europa Gold is worth X million, so yes 650k is a good deal even if you can only get 1 piece of cloth from it, but it's original
form of course is more valuable.
Here's the exact details of "Aura of Amber Pigment":
It was released in Publish 74 on January 31, 2012 as a reward in the cleanup Britannia.
It was taken away in Publish 75 on March 26, 2012.
http://www.uoguide.com/Aura_of_Amber_Pigment
I didn't play UO a single second in 2012, the last time I played was about 3 years ago, every item from my inventory is 3+ years old at the
newest.