### Steps to reproduce

[almassolarenrgi]

Steps to reproduce

Add hover color to InputDecoration of DropDownButtonFormField

Expected results

Color is applied when to dropdown when the mouse hovers over

Actual results

If filled is true then nothing happens. If filled is false, the hover color is some default grey

Code sample

Code sample

import 'package:flutter/material.dart';

class TestScreen extends StatelessWidget {
  const TestScreen({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final items = ['A', 'B', 'C', 'D'];
    return Column(children: [
      const Text('Testing dropdown'),
      const SizedBox(height: 20),
      DropdownButtonFormField<String>(
        value: 'A',
        items: items
            .map(
              (e) => DropdownMenuItem<String>(
                value: e,
                child: Text(
                  e,
                  softWrap: true,
                  maxLines: 2,
                ),
              ),
            )
            .toList(),
        onChanged: (String? value) {},
        decoration: const InputDecoration(
          hoverColor: Colors.green,
          focusColor: Colors.yellowAccent,
          border: OutlineInputBorder(
            borderSide: BorderSide(color: Colors.red),
          ),
        ),
      )
    ]);
  }
}

Screenshots or Video

Screenshots / Video demonstration

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Logs

Logs

[Paste your logs here]

Flutter Doctor output

Doctor output

[✓] Flutter (Channel stable, 3.22.0, on macOS 12.6.8 21G725 darwin-arm64, locale en-VN)
    • Flutter version 3.22.0 on channel stable at /Users/mht/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 5dcb86f68f (9 weeks ago), 2024-05-09 07:39:20 -0500
    • Engine revision f6344b75dc
    • Dart version 3.4.0
    • DevTools version 2.34.3

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
    • Android SDK at /Users/mht/Library/Android/sdk
    • Platform android-34, build-tools 33.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.12+0-b1504.28-7817840)
    • All Android licenses accepted.

[!] Xcode - develop for iOS and macOS (Xcode 14.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 14C18
    ! Flutter recommends a minimum Xcode version of 15.
      Download the latest version or update via the Mac App Store.
    ! CocoaPods 1.11.3 out of date (1.13.0 is recommended).
        CocoaPods is used to retrieve the iOS and macOS platform side's plugin code that responds to your plugin usage on the Dart side.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/platform-plugins
      To upgrade see https://guides.cocoapods.org/using/getting-started.html#updating-cocoapods for instructions.

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2021.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.12+0-b1504.28-7817840)

[✓] VS Code (version 1.89.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (3 available)
    • macOS (desktop)                 • macos                 • darwin-arm64   • macOS 12.6.8 21G725 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin         • macOS 12.6.8 21G725 darwin-arm64
    • Chrome (web)                    • chrome                • web-javascript • Google Chrome 126.0.6478.127

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

Originally posted by @glaceon2000 in flutter/flutter#151460