You've got to question the longevity of that purple because the past has gone all sorts of shades of blue.
Every year I would replace my fixtures magnet on my kitchen fridge with the next one, sticking one after another on an old file cabinet in my studio. Each would face the same level of UV as time marched on, the older ones obviously getting more. Not one of them is the same colour anymore - the only one that held any red was the 2007 one (which stands to reason as 2006 was a great year). Some shocking designs over the years but now that they're a thing of the past...well, who gives a crap eh.