anchor.diff:              height: 67,
               width: MediaQuery.of(context).size.width / 2,
               child: FlatButton(
  -              color: Colors.white,
  +              color: isFull ? Colors.white : Colors.blue,
                 textColor: Colors.black,
                 disabledColor: Colors.grey,
                 disabledTextColor: Colors.black,
  
positive.code:             height: 67,
              width: MediaQuery.of(context).size.width / 2,
              child: FlatButton(
                color: Colors.white,
                textColor: Colors.black,
                disabledColor: Colors.grey,
                disabledTextColor: Colors.black,
  
negative.code:   List<Widget> buildDateWidgets(List<DateTime> dates) {
      dateButtonList = new List<Widget>();
      dates.forEach((f) => dateButtonList.add(FlatButton(
            color: isSelectedDate(f) ? Colors.blue : Colors.white,
            textColor: Colors.black,
            disabledColor: Colors.grey,
            disabledTextColor: Colors.black,
  