Color of border isn't changing ?

[abraraltaf92]

Widget dropDownMenu() => MultiSelectFormField(
fillColor: Colors.white,
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(15),
borderSide: BorderSide(color: Colors.red), //### _ COLOR ISSUE_
),
dialogShapeBorder: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(12.0))),
title: const Text("Types of Bonds"),
dataSource: appleTypes,
textField: 'display',
valueField: 'value',
okButtonLabel: 'OK',
cancelButtonLabel: 'CANCEL',
hintWidget: const Text('Please choose one or more type'),
initialValue: _myActivities,
onSaved: (value) {
print('pressed');
},
chipBackGroundColor: Colors.amber[100],
);

[ws-fjq]

Still an issue.