System was rendering white if alarms came in too fast.

src/vi/dotlan.py

@@ -472,6 +472,7 @@ def setStatus(self, newStatus, statusTime = None):
             for maxDiff, alarmColor, secondLineColor in self.ALARM_COLORS:
                 if delta < maxDiff:
                     self.setBackgroundColor(alarmColor)
+                    break
         elif newStatus == states.CLEAR:
             self.lastAlarmTime = statusTime
             self.setBackgroundColor(self.CLEAR_COLOR)