u/steelersrg8

I have a question about the Medusa in Dr stone. We see after the first stoning that Ryusie’s fingers weren’t all there so they were restored by the Medusa as like a deep blue. We see his brother Sai has almost like a deep forest green on his arms that were missing. We see most characters have black cracks that were formed but in the poop sequence during the treasure island island the poop is light brown like scar tissue on Kazeki when they say they were going to restore him with that poop shaped piece missing. So what exactly determines the color of the recovered parts after the Medusa is activated?