I understand Musou black has it beat: https://takemy.money/musou-black-the-new-blackest-paint-in-the-world#:~:text=That%20said%2C%20Musou%20Black%20is,Semple's%

I understand Musou black has it beat: https://takemy.money/musou-black-the-new-blackest-paint-in-the-world#:~:text=That%20said%2C%20Musou%20Black%20is,Semple's%20next%20move%20will%20be https://takemy.money/musou-black-the-new-blackest-paint-in-t...! And the blackest (non-acrylic) paint is Vantablack, the carbon-nanotube-based paint that is infamously only available to Anish Kapoor.