Three Colors: Blue
philipball.blogspot.com
philipball.blogspot.com
If you squint you can relate them to the French Flag and the French ideals of Liberte, Egalite, Fraternite... But you do have to squint, Kieślowski made only a thin pretense of doing what the people paying for the art wanted, and since he was a genius they seem to have made only a thin pretense of demanding he do so.
He attracted top talent to his productions, including actors, cinematographers (Slawomir Idziak, whom I had a pleasure to spend many hours with), and composers (Zbigniew Preisner). Although most of his work was created in the times of USSR and communism in Poland, he continued to push the boundaries of filmmaking with the limited resources he had access to.
I believe this is the same trick behind vantablack.
There are some really interesting documentaries about the mine, and what impresses me most is just how remote and dangerous the trek is. Mining there 4000-5000 years ago with primitive tools, and the journey required to get the Lapis from Afghanistan all the way to Egypt is really very remarkable. It's a difficult journey today even with Range Rovers.
Related to the OP, but not Lapis mining: an interesting related discovery (2009): https://chemistry.oregonstate.edu/content/story-yinmn-blue
(The next question, of course, would then be sourcing that quantity of paint....)