On task flags, change "No Date" and "Custom" colors to not match "Today"
In Outlook and OneNote, the flag color for items due today and on a custom date are both red, making them indistinguishable. Red should be reserved for items due today or overdue. Some other color should be used for "Custom" and "No Date" (which is red in Outlook mail but buff in OneNote). Without this change, the task feature is less usable, since I cannot tell at a glance if I need to get a task done quickly or not for a custom date in the future.