I am sorry but I'm afraid I cannot state the issue more clearly. The colours and the difference among them makes things not user friendly. The fact there's already a ticket similar to this one, makes my argument even stronger.

Well, they're not strong and distinctive enough. For me this argument is very clear judging from how I felt when I first saw the changes. Again, it's really not a matter of preference.

Thank you for your reply. I am actually referring to the Show Changes window panels and the main file list showing modified/added/removed files. And yes it's not a matter of taste, they're not aiding readability at all.