title: How to change ElevatedButton text color in elevatedButtonTheme?
body: <p>I'm trying to change ElevatedButton text color in elevatedButtonTheme property in theme but cannot change.
  I know that TextStyle in the child of Text can change the color of Text, but I prefer to define in elevatedButtonTheme.</p>
  <pre><code>import 'package:flutter/material.dart';
  import 'package:hexcolor/hexcolor.dart';
  
  void main() {
    runApp(MyApp());
  }
  
  class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        title: 'Flutter Demo',
        home: MyHomePage(title: 'Flutter Demo Home Page with 2.0'),
        theme: ThemeData(
          primaryColor: HexColor('#003f71'),
          accentColor: HexColor('#e09e36'),
          scaffoldBackgroundColor: HexColor('#003f71'),
          textTheme: TextTheme(bodyText2: TextStyle(fontSize: 16.0), button: TextStyle(fontSize: 16.0)),
          elevatedButtonTheme:
              ElevatedButtonThemeData(style: ElevatedButton.styleFrom(minimumSize: Size(1, 45), primary: HexColor('#e09e36'), textStyle: TextStyle(fontSize: 16.0, color: Colors.black))),
        ),
      );
    }
  }
  
  class MyHomePage extends StatefulWidget {
    MyHomePage({Key key, this.title}) : super(key: key);
  
    final String title;
  
    @override
    _MyHomePageState createState() =&gt; _MyHomePageState();
  }
  
  class _MyHomePageState extends State&lt;MyHomePage&gt; {
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        body: Container(
          alignment: Alignment.center,
          margin: const EdgeInsets.all(15.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: &lt;Widget&gt;[
              Container(
                margin: const EdgeInsets.symmetric(vertical: 15.0),
                child: FractionallySizedBox(
                  alignment: Alignment.center,
                  widthFactor: 1.0,
                  child: ElevatedButton(onPressed: () {}, child: Text('ElevatedButton')),
                ),
              ),
            ],
          ),
        ),
      );
    }
  }
  </code></pre>
  <p><a href="https://i.stack.imgur.com/JPRpD.png" rel="noreferrer"><img src="https://i.stack.imgur.com/JPRpD.png" alt="enter image description here" /></a></p>