OneOfficeERP allows users to add colours to certain documents for better visual cues and representation.
A good example of this would be the Event Calendar, where you can add a colour for each event.
We will be doing so by customizing Tasks under the Projects module.
Add a new field in the doctype of fieldtype color.
Check In List View option.
Save the form, go back to the Task list, and reload.
When opening an existing or new Task, you should see a color field. Pick a color for the Task.