AliAnilKocak

      theme: ThemeData(
        primaryColor: Color(0xFF56D4F9),
      )

AliAnilKocak

https://gist.github.com/AliAnilKocak/65b5caf3d9b5e5da193cda5664d8eee5.js

AliAnilKocak

MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Programming Quotes',
      theme: ThemeData(
        primaryColor: Color(0xFF56D4F9),
      ),
      home: HomePage(),
    );

AliAnilKocak

void _openFullMaterialColorPicker() async {
    _openDialog(
      "Renk seç",
      MaterialColorPicker(
        colors: materialColors,
      ),
    );
  }

  void _openDialog(String title, Widget content) {

AliAnilKocak

GestureDetector(
  onTap: () {
     _openFullMaterialColorPicker();
    },
  child: Text(
     "Tema Değiştir",
     style: TextStyle(fontSize: 12, color: Colors.white),
   ),
  ),

AliAnilKocak

class ThemeNotifier with ChangeNotifier {
  Color _themeData;

  ThemeNotifier(this._themeData);

  getColor() => _themeData;

  setColor(Color themeData) async {
    _themeData = themeData;
    notifyListeners();

AliAnilKocak

runApp(
   ChangeNotifierProvider<ThemeNotifier>(
     create: (_) => ThemeNotifier(Color(0xFF56D4F9)), //Default renk
    child: MyApp(),
  ),
);

AliAnilKocak

final themeColor = Provider.of<ThemeNotifier>(context);

AliAnilKocak

onColorChange: (color) {
  setState(() {
    themeColor.setColor(color);
  });
},

AliAnilKocak

onColorChange: (color){
     themeColor.setColor(color);
},