import 'package:flutter/material.dart';

const Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: darkBlue,
      ),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        DataTable(
          dividerThickness: 0,
          columns: const [
            DataColumn(label: Text('h1')),
            DataColumn(label: Text('h2')),
          ],
          rows: const [
            DataRow(cells: [DataCell(Text('1')), DataCell(Text('2'))]),
            DataRow(cells: [DataCell(Text('3')), DataCell(Text('4'))]),
          ],
        ),
        DataTableTheme(
          data: Theme.of(context).dataTableTheme.copyWith(dividerThickness:0),
          child: DataTable(
            dividerThickness: 0,
            columns: const [
              DataColumn(label: Text('h1')),
              DataColumn(label: Text('h2')),
            ],
            rows: const [
              DataRow(cells: [DataCell(Text('1')), DataCell(Text('2'))]),
              DataRow(cells: [DataCell(Text('3')), DataCell(Text('4'))]),
            ],
          ),
        ),
      ],
    );
  }
}