Pigments are an interesting adventure to study. Some are very toxic. Some are very rare.
Interestingly as well, purple isn't a real color, it isn't in the spectrum, does not exist in nature. The perception of purple is created in the brain. This is part of why such pigments that produce that color perception were once very rare and very expensive. It was known as the "color of royalty".
The largest pigment archive in the world is the Forbes Pigment Collection at the Harvard Art Museums.
Nerd moment. We now return you to your regularly scheduled programming.
I realize this post has gone completely off the rails at this point but I can't help myself. I work in the printing industry. Inks and color are my bread and butter.
Color, like most things, is a much more complex subject than a lot of people realize. A very big reason for that is because so much of it is based on perception. We have spectrophotometers that can scan a color and break it down into a digital signature so it can be recreated elsewhere. But even that can't guarantee an exact match because there are so many other variables. Light source, substrate, viewing angle... Those are just a few that will completely throw off what a color looks like. That's not even taking into account the individual. Fun Fact: Women tend to have more accurate color perception than men.
I'm sure a lot of you guys know Brent Hartman (BHQ) and the incredible cues he made. And just throwing this out there, I don't have a problem naming him because he was very open about this, he's color blind. So there would be times he would post veneer stacks on Facebook (and maybe even here) asking if they matched and/or were the colors he thought they were. He's a great dude and I admire him for his workaround for being color blind but making cues where color matters so much.
a foul.