IOS 26 HAS NEW HOME SCREEN SETTING FOR APP ICONS, HERE'S HOW TO USE IT

Summary from the TLDR Design newsletter

iOS 26 expands iPhone personalization by adding new “Tinted” options that automatically match app icon colors to your iPhone or (compatible) case, building on earlier customization features introduced in iOS 18. The setting is easy to enable via the Home Screen edit menu, though case-based matching depends on supported cases like Apple's MagSafe models and select third-party options.