khadinakbarlabs/expo-mobile-app-builder/apply-material-you-dynamic-colors

Apply Material You Dynamic Colors

User's Android wallpaper → app's color palette. Premium signal on Pixel devices.

How it works

• Android 12+ extracts colors from wallpaper (Monet engine)
• System exposes 5 tonal palettes (primary, secondary, tertiary, neutral, neutral variant)
• Each palette has 13 tones (0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 95, 99, 100)
• App reads these and themes accordingly

RN+Expo setup

pnpm add @pchmn/expo-material3-theme

// App.tsx
import { useMaterial3Theme } from '@pchmn/expo-material3-theme';
import { PaperProvider, MD3LightTheme, MD3DarkTheme } from 'react-native-paper';
import { useColorScheme } from 'react-native';
export default function App() {
  const colorScheme = useColorScheme();
  const { theme } = useMaterial3Theme({
    fallbackSourceColor: '#3E8260', // your brand color as fallback
  });
  const paperTheme = colorScheme === 'dark'
    ? { ...MD3DarkTheme, colors: theme.dark }
    : { ...MD3LightTheme, colors: theme.light };
  return (
    <PaperProvider theme={paperTheme}>
      <YourApp />
    </PaperProvider>
  );
}

What you get

theme.light.primary           // #6750A4 (user's wallpaper-derived)
theme.light.onPrimary         // text on primary
theme.light.primaryContainer  // softer version of primary
theme.light.onPrimaryContainer
theme.light.secondary
theme.light.tertiary
// ... and so on for all M3 color roles

Devices that support dynamic colors

• Pixel 6+ on Android 12+
• Samsung One UI 4+ (Galaxy S20+, with some delay)
• OxygenOS 12+ (OnePlus)
• Other OEMs with Android 12+ skin

Fallback strategy

For pre-Android 12 OR OEMs that don't support:

• Use your brand color as the source
• @pchmn/expo-material3-theme auto-falls back

Should you opt OUT of dynamic colors?

Yes if:

• You're a strong brand (Spotify green, Netflix red)
• Your category is mood-specific (kids app, fitness motivator)

Then:

const { theme } = useMaterial3Theme({
  sourceColor: '#YOUR_BRAND_COLOR',  // force, ignore wallpaper
});

Test on different wallpapers

Real devices: change wallpaper, kill app, reopen → colors should re-derive.

Emulator: Settings → Wallpaper → change → restart app.

Common gotchas

• useMaterial3Theme requires Android 12+ for dynamic; below = falls back
• React Native Paper v5+ uses M3 by default; v4 still MD2
• Don't hard-code colors anywhere — use theme tokens always
• Test in both light and dark modes after every wallpaper change

Pair with

• apply-material3 for component compliance
• figma-to-rn-android for design conversion
• add-edge-to-edge-android for full-screen rendering