Solved: How to change text color of AppBar, icon color of FAB universally using theme?

Question

Asked by ryanafrish7 on May 31, 2018 (source).

I am able to set the background color of AppBar to Colors.amber. This automatically sets the text color to Black. I am aware of the accessibility issues that may arise but anyways I want the text color to be White.

I am still able to set the text color from the AppBar but I would like to set it universally.

Here's the theme I'm using for my app.

title: 'Flutter Demo',
theme: new ThemeData(
  primarySwatch: Colors.amber,
  textTheme: Theme.of(context).textTheme.apply(
    bodyColor: Colors.white,
    displayColor: Colors.white,
  ),
),

Answer

Question answered by Nader D (source).

I think the most straightforward way of doing this is to adjust the title color for the theme that you are working with:

theme: new ThemeData(
  primarySwatch: Colors.grey,
  primaryTextTheme: TextTheme(
    headline6: TextStyle(
      color: Colors.white
    )
  )
)
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