flutter dropdown menu background color
// Wrap it in a Theme() Widget like this
Theme(
data: Theme.of(context).copyWith(canvasColor: Colors.green),
child: DropdownButton(
value: yourValue,
icon: Icon(Icons.keyboard_arrow_down, color: Colors.white),
onChanged: (value) {
},
items: yourItems,
style: TextStyle(color: Colors.white),
),
),