Desafio de cores

Container(
 color: (nivel <= 5)
     ? Colors.yellow
     : (nivel <=7)
     ? Colors.orange
     : Colors.blue,
 child: Row(

   mainAxisAlignment: MainAxisAlignment.spaceBetween,
   children: [
     Padding(
       padding: const EdgeInsets.all(8.0),
       child: Container(
           decoration: BoxDecoration(
             color: Colors.red,
           ),
           width: 200,
           child: LinearProgressIndicator(
             color: Colors.white,
             value: (widget.dificuldade > 0)
                 ? (nivel / widget.dificuldade) / 10
                 : 1,
           )),
     ),
     Padding(
       padding: const EdgeInsets.all(12.0),
       child: Text(
         'Nivel: $nivel',
         style:
         const TextStyle(color: Colors.white, fontSize: 16),
       ),
     ),
   ],
 ),
)