i'm tryng to use a gradient on a textfield border but without sucess. is it possible?

```
    Widget _passwordTF() {
  return TextField(
    obscureText: true,
    decoration: InputDecoration(
      enabledBorder: OutlineInputBorder(
        borderSide: BorderSide(
          color: LinearGradient(colors: [color1, color2]),
        ),
      ),
    ),
  );
}

```

it says "The argument type 'LinearGradient' can't be assigned to the parameter type 'Color'"