Fix "RefreshIndicator.color didn't update at runtime" (#73566)

* update dependencies when widget configuration changes

packages/flutter/lib/src/material/refresh_indicator.dart

@@ -238,6 +238,22 @@ class RefreshIndicatorState extends State<RefreshIndicator> with TickerProviderS
     super.didChangeDependencies();
   }
 
+  @override
+  void didUpdateWidget(covariant RefreshIndicator oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.color != widget.color) {
+      final ThemeData theme = Theme.of(context);
+      _valueColor = _positionController.drive(
+        ColorTween(
+          begin: (widget.color ?? theme.accentColor).withOpacity(0.0),
+          end: (widget.color ?? theme.accentColor).withOpacity(1.0),
+        ).chain(CurveTween(
+            curve: const Interval(0.0, 1.0 / _kDragSizeFactorLimit)
+        )),
+      );
+    }
+  }
+
   @override
   void dispose() {
     _positionController.dispose();

packages/flutter/test/material/refresh_indicator_test.dart

@@ -677,4 +677,52 @@ void main() {
     await tester.pump(const Duration(seconds: 1)); // finish the indicator settle animation
     expect(find.byType(RefreshProgressIndicator), findsNothing);
   });
+
+  testWidgets('RefreshIndicator.color can be updated at runtime', (WidgetTester tester) async {
+    refreshCalled = false;
+    Color refreshIndicatorColor = Colors.green;
+    const Color red = Colors.red;
+    late StateSetter setState;
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: StatefulBuilder(
+          builder: (BuildContext context, StateSetter stateSetter) {
+            setState = stateSetter;
+            return RefreshIndicator(
+              triggerMode: RefreshIndicatorTriggerMode.anywhere,
+              onRefresh: holdRefresh,
+              color: refreshIndicatorColor,
+              child: ListView(
+                reverse: true,
+                physics: const AlwaysScrollableScrollPhysics(),
+                children: const <Widget>[
+                  SizedBox(
+                    height: 200.0,
+                    child: Text('X'),
+                  ),
+                  SizedBox(
+                    height: 800.0,
+                    child: Text('Y'),
+                  ),
+                ],
+              ),
+            );
+          },
+        ),
+      ),
+    );
+
+    await tester.fling(find.text('X'), const Offset(0.0, -300.0), 1000.0);
+    await tester.pump();
+    expect(tester.widget<RefreshProgressIndicator>(find.byType(RefreshProgressIndicator)).valueColor!.value, refreshIndicatorColor.withOpacity(1.0));
+
+    setState(() {
+      refreshIndicatorColor = red;
+    });
+
+    await tester.fling(find.text('X'), const Offset(0.0, -300.0), 1000.0);
+    await tester.pump();
+    expect(tester.widget<RefreshProgressIndicator>(find.byType(RefreshProgressIndicator)).valueColor!.value, red.withOpacity(1.0));
+  });
 }