Dark Mode: useColorScheme() always returns light on Android

SDK Version: 42.0.0
Platforms(Android/iOS/web/all): Android

Hey guys,

I am trying to get Dark Mode to work and it doesn’t work on Android. It always returns “light”. On iOS it works fine.

import React from 'react';
import { useColorScheme } from "react-native";

export default function App() {
  const theme = useColorScheme();
  alert("your color scheme is: " + theme); // always returns "light" on Android
  return null;

I am using Expo SDK 42.

I put "userInterfaceStyle": "automatic" in my app.json but it doesn’t make a difference.

I figured it out. It was not enough to just put "userInterfaceStyle": "automatic" in app.json root, I had to define it for iOS and Android individually too:


  "expo": {
    "userInterfaceStyle": "automatic",
    "ios": {
      "userInterfaceStyle": "automatic"
    "android": {
      "userInterfaceStyle": "automatic"

thanks for pointing this out – this appears to be a bug on the android side in expo go. i have created an issue for it here: Root userInterfaceStyle does not apply on Android in Expo Go · Issue #13488 · expo/expo · GitHub

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