@expo/ui Host has no way to opt out of Material You dynamic colour on Android. HostView.kt uses dynamicLightColorScheme(context) / dynamicDarkColorScheme(context) on any API ≥ 31, and the existing colorScheme prop only selects light vs dark — both branches still pull the wallpaper palette. Apps with a fixed brand palette therefore can't make Host match the rest of their UI. MaterialExpressiveTheme(colorScheme = …) already takes a ColorScheme, so an optional colors prop (or dynamicColor={false}) would be additive and non-breaking.