In terms of software, what I have noticed (and what I have seen on my own phone) is that the most common colors that have been used are blue, green, and red. It’s not very often you see other colors like brown or yellow. Oftentimes, I have seen these less commonly used colors when it is actually being used to depict something in real life (Ex. a book app I have has a brown color to represent a book). I think these three colors are used most commonly mainly because they all have positive associations with most people. Like others have said, blue tends to be more calming, which may be used for apps one might use for a long time. The same might be said for green, due to other associations with that color (correct, good, go, etc.). Red might be used in order to make a statement or come across as useful (apps like gmail, youtube, apple news, banking apps, etc.) Overall, it seems the scheme of colors in apps doesn’t just stay with the logo, but also translates to the whole app design as well, with the app using the same colors the logo was designed with.