how to change the border colour of this text field to white. here's my code for text field. default it display as a black border. I want to fill the text box with white colour and white padding.

```
Widget TextBox() => Container(
  child: Row(mainAxisAlignment: MainAxisAlignment.center, children: [
    Container(
        height: 60,
        width: 300,
        child: TextField(
          decoration: InputDecoration(
              border: OutlineInputBorder(borderRadius:BorderRadius.circular(15),  ),
              hintText: 'Enter Name',
              fillColor: Colors.white,filled: true
            // Border

          ),
        )),
  ]),
);

```