The colored dot shown on the task list is a filling indicator for the subtasks contained within each task.
Green dot: all subtasks inside the task have been completed.
Orange dot: some subtasks are missing, but they will not prevent you from sending your flight report.
Red dot: a mandatory subtask has not been completed. This will prevent you from sending your flight report.
If you are missing a mandatory subtask, the following message will appear when you attempt to send your flight report.
To learn more about what information will prevent you from sending the flight report, refer to Why can't I send my flight report?