Dark Mode, Dynamic Color, and the Appearance API in React Native

Users expect interfaces to respect system appearance settings and accessibility preferences. React Native exposes Appearance and useColorScheme hooks, but consistent theming requires semantic tokens—not ad hoc hex literals scattered through components and native stylesheets.

Semantic palettes and elevation

Define tokens for background.default, surface.elevated, text.primary, and border.subtle. Map tokens to platform-specific values for light and dark. Document contrast ratios against WCAG targets for text and interactive controls.

Android dynamic color and Material You

On Android 12+, consider integrating Material You dynamic palettes derived from wallpaper when product design allows. Fall back to brand palettes on older versions. Verify status bar and navigation bar contrast with edge-to-edge layouts.

Images, icons, and third-party SDKs

Provide vector assets with currentColor where possible. Raster icons may need tinted variants. Audit embedded WebViews and maps for theme parity—mixed-mode UIs frustrate users.

Testing matrix

Automate screenshot tests in both schemes. Validate reduced transparency and increased contrast settings on iOS when applicable.

Conclusion

Theming is cross-cutting: navigation headers, modals, toasts, and native dialogs must align. Centralize decisions in a design system package consumed by applications.