diff --git a/simple_shader/README.md b/simple_shader/README.md
new file mode 100644
index 000000000..bf957b20e
--- /dev/null
+++ b/simple_shader/README.md
@@ -0,0 +1,7 @@
+# `simple_shader`
+
+A simple [Flutter fragment shaders][] sample project.
+
+  [Flutter fragment shaders]: https://docs.flutter.dev/development/ui/advanced/shaders
+
+![Screenshot of the `simple_shader` app](screenshot.png)
diff --git a/simple_shader/lib/main.dart b/simple_shader/lib/main.dart
index 2044ed9fd..c63bdf593 100644
--- a/simple_shader/lib/main.dart
+++ b/simple_shader/lib/main.dart
@@ -14,7 +14,7 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       title: 'Simple Shader Demo',
       theme: ThemeData(
-        primarySwatch: Colors.blue,
+        colorSchemeSeed: Colors.blue,
         useMaterial3: true,
       ),
       home: const MyHomePage(),
@@ -42,7 +42,7 @@ class _MyHomePageState extends State<MyHomePage> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('Simple Shader'),
+        title: const Text('Simple Shader Demo'),
       ),
       body: FutureBuilder<ui.FragmentProgram>(
         future: program,
diff --git a/simple_shader/screenshot.png b/simple_shader/screenshot.png
new file mode 100644
index 000000000..2e8df52e4
Binary files /dev/null and b/simple_shader/screenshot.png differ