There's a whole book by great Science (journal) science writer Kai Kupferschmidt about the color blue: https://www.amazon.com/Blue-Search-Natures-Rarest-Color/d

There's a whole book by great Science (journal) science writer Kai Kupferschmidt about the color blue: https://www.amazon.com/Blue-Search-Natures-Rarest-Color/dp/1615197524 https://www.amazon.com/Blue-Search-Natures-Rarest-Color/dp/1...