TIL That the color blue doesn’t exist in the animal or plant kingdoms, and is instead created by various optical illusions

https://set.adelaide.edu.au/news/list/2019/08/20/why-is-the-colour-blue-so-rare-in-nature

https://www.reddit.com/r/todayilearned/comments/15rky0p/til_that_the_color_blue_doesnt_exist_in_the/