circles aaround icons in flutter

 CircleAvatar(
               backgroundColor: Colors.white,//back ground colors
               .withOpacity(0.3) //opectional give opacity of background
               radius: 30,
              child: Icon(Icons.navigate_next,//iconstype
               size: 70, //set the isze or icons
             color: Colors.blue //colors you want give
                 ),
               ),// method