How to change the text color of the button theme in Flutter : <p>If I add a theme to my app like this:</p>

<pre><code>class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primaryColor: Color(0xff393e46),
        primaryColorDark: Color(0xff222831),
        accentColor: Color(0xff00adb5),
        backgroundColor: Color(0xffeeeeee),
        buttonTheme: ButtonThemeData(
          buttonColor: Color(0xff00adb5),
        )
      ),
      home: Scaffold(
        body: MyHomePage(),
      ),
    );
  }
}
</code></pre>

<p>How do I change the text color for the button theme?</p>
