title: How to set the background color for a layout element in flutter
body: <p>I would like to set the background color of both columns left/right.</p>
  
  <p>I thought columns/rows have similar meaning/functionality like bootstrap in web development.</p>
  
  <p>But it seems everything is more laborious...</p>
  
  <p>Please do not tell me I have to wrap each Expanded with the Container widget and set there the color...</p>
  
  <pre><code>Container(
    margin: EdgeInsets.all(5),
    color: Colors.orangeAccent,
    child: Column(children: &lt;Widget&gt;[
      Row(
        children: &lt;Widget&gt;[
          Expanded(
            flex: 3,
            child: Column(
              children: &lt;Widget&gt;[
                Text("left", textAlign: TextAlign.end,),
              ],
            ),
          ),
          Expanded(
            flex: 7,
            child: Column(
              children: &lt;Widget&gt;[
                Text(
                  "right",
                  textAlign: TextAlign.right,
                ),
              ],
            )
          ),
        ],
      ),
      Row(
        children: &lt;Widget&gt;[],
      )
    ]),
  ),
  </code></pre>