How important was the invention of blue towards anime? In the video of Vsauce2 it is mentioned that 


  Prussian blue ... it reinvigorated Japanese wood block painting, which went on to influence manga which led to Japanese animation


The phrasing makes it sound like the invention of this Prussian blue is one of the key factors towards the development of Japanese animation or anime.

But was this invention really a key factor towards the creation of anime? Or did this Prussian blue really have a an effect to the creation of Anime at all?
Honestly no, it's like saying that a certain type of pen led to anime and manga, or that the printing press led to their eventual creation, sure it could help make the experience much better and easier, but they aren't necessarily creation sparkers. Prussian blue just gave us a new cool looking color to use in anime and manga, but was not key in its development. Our desire and interest for storytelling along with our fascination in artistic expression is more linked to the creation of anime and manga, definitely not Prussian blue.