I updated my iPhone 16 Pro Max to iOS 26. I noticed when I looked at my contacts, each contact background is like a purple color. I don't like this as I can't see the contact info; I need more light. I don't even run my computers in dark mode as I can't see that well. I would like all of my contacts to have the white background like it used to be before updating to iOS 26 so I can see the contact info. Any ideas how I can change the background color back to white? Thank you.