#11 DatePicker hardly readable with OS X

[Marcus Beyer]

used version: 0.4.4.3

DatePicker Colors are Black on Dark Blue which is nearly unreadable.

workaround:

Map<String, Color> colorOverrideMap = new HashMap<String, Color> ( );
colorOverrideMap.put (CalendarColors.COLOR_CALENDAR_HEADER_BACKGROUND_ENABLED, new Color(127, 210, 248));
colorOverrideMap.put (CalendarColors.COLOR_CALENDAR_HEADER_FOREGROUND_ENABLED, Color.BLACK);
datePicker.setColorOverrideMap (colorOverrideMap);