Flutter primarySwatch changes text colors and icon colors - flutter

Question

I am currently getting into using Themes in Flutter. I don't fully understand the primarySwatch yet.
I am setting an app wide theme in the MaterialApp class. I wan tto change the primarySwatch, so all the buttons I use within the app have the same color. When I use primarySwatch: Colors.blue, the text and icons inside the buttons, inside the appBar and so on are white. When I use primarySwatch: Colors.orange, the text is black. I found out that there are "bright" and "dark" colors, and probably according to that, the text color changes from white to black. But is there a way to use a "bright" color and still have white texts and icons without overriding all of them?

Answer 1

EDIT: I didn't see that the question asked "without overriding all of them"
You may want to create a TextButtonThemeData in your ThemeData like so:
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(
textButtonTheme: TextButtonThemeData(
style: ButtonStyle(
textStyle: MaterialStateProperty.all<TextStyle>(
TextStyle(color: Colors.white),
),
),
),
),
title: 'Flutter Demo',
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}