title: Flutter's applications default color
body: <p>I'm making a <code>Welcome Screen</code> which has two <code>TextButtons</code> each wrapped in a <code>Container</code>.<br>
  one for Creating an account and another for logging in
  (both of them have some shadow below them )
  <a href="https://i.stack.imgur.com/IR6b0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IR6b0.png" alt="enter image description here" /></a></p>
  <p>I managed to make both containers in flutter but I found out that the background color of the application is not pure white (#FFFFFF) which mean if I set the color of the login container to <code>Colors.white</code> it won't look like the background color of the app like above picture.<br></p>
  <p>So I need a way to set the color of the login container to the same color as the application.
  let's avoid hard coding I don't want to determine the background color with an external tool and set it to the button.
  I was thinking of taking same color as parent or something like that but I don't know if that exists.</p>
  <p><a href="https://gist.github.com/AzerSD/df9b7ede44be2ae4ea110b0052576c5b" rel="nofollow noreferrer">main.dart</a></p>
  <p><a href="https://gist.github.com/AzerSD/61b5d4bcbde85017f0ff340c63b3fc69" rel="nofollow noreferrer">WelcomeScreen.dart</a></p>