我想把包含十六进制 colored颜色 代码的容器设置为不透明.我对Flutter 翼是个新手.请帮帮我.这是密码.提前谢谢您.
final body = Container(
width: MediaQuery.of(context).size.width,
margin: const EdgeInsets.only(left: 40.0, right: 40.0),
padding: EdgeInsets.all(28.0),
decoration: new BoxDecoration(
color: const Color(0xFF0E3311),//here i want to add opacity
border: new Border.all(color: Colors.black54,
),
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(40.0),
topRight: const Radius.circular(40.0),
bottomLeft: const Radius.circular(40.0),
bottomRight:const Radius.circular(40.0) )
),
child: Column(
children: <Widget>[ email, password,loginButton],
),
);