Using Container and/or BoxDecoration color property error is confusing  #36161

body: Container(
        width: 50.0,
        height: 50.0,
        color: Colors.blue, //error as well not quite expected
        decoration: BoxDecoration(
          //     color: Colors.red,
          border: Border.all(
              color: Colors.green, width: 5.0, style: BorderStyle.solid),
        ),
      ),
    );

body: Container(
        width: 50.0,
        height: 50.0,
        color: Colors.blue, //expected error 
        decoration: BoxDecoration(
        color: Colors.red,
          border: Border.all(
              color: Colors.green, width: 5.0, style: BorderStyle.solid),
        ),
      ),
    );

I/flutter (20774): The following assertion was thrown building HomePage(dirty, state: _HomePageState#a88dc):
I/flutter (20774): Cannot provide both a color and a decoration
I/flutter (20774): The color argument is just a shorthand for "decoration: new BoxDecoration(color: color)".
I/flutter (20774): 'package:flutter/src/widgets/container.dart':
I/flutter (20774): Failed assertion: line 271 pos 15: 'color == null || decoration == null'
I/flutter (20774):
I/flutter (20774): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (20774): more information in this error message to help you determine and fix the underlying cause.
I/flutter (20774): In either case, please report this assertion by filing a bug on GitHub:

import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(
    home: new HomePage(),
  ));
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => new _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        width: 50.0,
        height: 50.0,
        color: Colors.blue,
        decoration: BoxDecoration(
          //     color: Colors.red,
          border: Border.all(
              color: Colors.green, width: 5.0, style: BorderStyle.solid),
        ),
      ),
    );
  }
}