[erybodyknows]

This reminds me of the blackest acrylic paint from Stuart Semple.

https://culturehustle.com/products/black-3-0-the-worlds-blac...

[S_Bear]

Stuart Semple also has a 'white 2.0' that looks like neon white compared to regular white.

https://www.culturehustleusa.com/products/white-20

[Pet_Ant]

If you want an idea of how this might feel on a room scale, here are Action Lab's whitest & blackest rooms:

Whitest: https://www.youtube.com/watch?v=DjdFn1RYHDE

Blackest: https://www.youtube.com/watch?v=p6q54q2iam8

[nicd]

I understand Musou black has it beat: 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.