How To Change Flutter Textformfield Focused Outline Border Color

In this tutorial, we’ll learn how to properly change Flutter textformfield focused outline border color by using a practical Flutter code example.

Outline

1. Introduction: Flutter Textformfield Focused Outline Border Color
2. Default Focused Outline Border Color
3. Change Flutter Textformfield Focused Outline Border Color
4. Custom Flutter Textformfield Focused Outline Border Color Source Code
5. Conclusion

Introduction: Flutter Textformfield Focused Outline Border Color

Focused border of textformfield is shown when the textformfield is focused/tapped. When we use outline border then it covers all the border sides of the textformfield.

Don’t worry, I will now implement it using proper example so you can have a better idea of what outline border is and how can we change Flutter textformfield focused outline border color.

Default Focused Outline Border Color

• For that we have to implement a simple Flutter textformfield widget.
• After that, we’ve to use the decoration constructor of the Flutter textformfield, then pass it input decoration class.
• Finally, we’ve to pass the outline input border class to its focused border constructor. See the below code:

TextFormField(
           decoration: InputDecoration(
                  focusedBorder: OutlineInputBorder()
                ),
              )

focusedBorder: OutlineInputBorder(
                borderSide: BorderSide(color: Colors.green))

import 'package:flutter/material.dart';
void main() {
  runApp(const MyApp());
}
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Homepage(),
    );
  }
}
class Homepage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(
            body: Center(
                child: Padding(
                    padding: EdgeInsets.symmetric(horizontal: 40),
                    child: TextFormField(
                      decoration: InputDecoration(
                          focusedBorder: OutlineInputBorder(
                              borderSide: BorderSide(color: Colors.green))),
                    )))));
  }
}