On the Schedule page, shifts appear in different colors. Here's what each one means:
Blue -- Unassigned shifts. The shift exists but hasn't been assigned to an employee yet. These need to be filled before publishing.
Orange -- Unpublished shifts. These shifts are assigned and active, but haven't been published yet – so employees haven't been notified of them.
Green -- Published shifts. These are assigned shifts that have been published. Employees have been notified and can see the shifts on their own schedules.