Decoupling Material's colors.dart

packages/material_ui/lib/m3.dart

@@ -0,0 +1,13 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/// The Flutter Material 3 library.
+///
+/// Subsequent versions of Material, such as Material 3 Expressive, will have
+/// their own libraries and directories.
+///
+/// To use, import `package:material_ui/m3.dart`.
+library m3;
+
+export 'src/m3/colors.dart';

packages/material_ui/lib/material_ui.dart

@@ -7,4 +7,4 @@
 /// To use, import `package:material_ui/material_ui.dart`.
 library material_ui;
 
-export 'package:flutter/material.dart';
+export 'm3.dart';