title: Not able to set background color to Container in Flutter
body: <p>I am using the below code to set the background color as <strong>black</strong> to the container, but it's not showing. </p>
  
  <pre><code>       Align(
              alignment: Alignment.bottomCenter,
              child: Container(
                color: Colors.black,
                margin: EdgeInsets.only(left: 20, right: 20, bottom: 20, top: 10),
                height: 40,
                width: double.infinity,
                child: RaisedButton(
                  textColor: Colors.white,
                  color: Colors.blue[300],
                  onPressed: () =&gt; null,
                  child: Text('Next'),
                ),
               ),
            )
  </code></pre>
  
  <p><strong>Output:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/gmocH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gmocH.png" alt="enter image description here"></a>   </p>
  
  <p>Can somebody please help me?</p>