Natural HR provides a calendar view for all levels of user to see their own, and possibly other people in the business's time off, birthdays, work anniversaries and national holidays. If you have the Natural HR Training module enabled then you will also see those entries too.

You are able to amend the colours that display for these events for the Calendar and the Planner. 

Within - Administration > Company > Options > Calendar Options

Here you can then select the desired colours required for each of the options listed.

Select the colour box to change the colour;

Once you have chosen or entered the required colour, select choose to add. 

Select Submit to save the changes made. 

These will then reflect within the Calendar and the Planner.