flutter – Checkbox border color

main.dart

import 'package:flutter/material.dart';

void main() => runApp(const FlutterExample());

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter Example',
        theme: ThemeData(primarySwatch: Colors.pink),
        home: const StateExample()
    );
  }
}

class StateExample extends StatefulWidget {
  const StateExample({Key? key}) : super(key: key);

  @override
  _StateExampleState createState() => _StateExampleState();
}

class _StateExampleState extends State<StateExample> {
  bool checkedStatus = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        backgroundColor: const Color(0xFFF5F5F5),
        appBar: AppBar(
            title: const Text("Flutter - Checkbox Border Color")
        ),
        body: bodyContent()
    );
  }


  bodyContent() {
    return Center(
        child: Theme(
          child: Checkbox(
            value: checkedStatus,
            onChanged: (bool? value){
              setState(() {
                checkedStatus = value??checkedStatus;
              });
            },
          ),
          data: ThemeData(
            // checked color
              primarySwatch: Colors.pink,
              // border color
              unselectedWidgetColor: Colors.green
          ),
        )
    );
  }
}

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