I found this study much rather interesting than the Grayscale study. I like using colors when it comes to these projects. The fact that your brain can play tricks on you to see the illusion of the middle square being a supposedly different shade of the original color makes it all the more fun.
I find it amazing on how your eyes can play that trick on you when one is darker than the other when in reality it isn’t. This study is very well done.
Nice work on this study. You can really see the difference.