You can change the default colours for each Leave Type in ESS. The colours will display when:
A member is looking at their own leave.
A manager is looking at leave for their team, which is the default team for the member.
An administrator is looking at leave for any member.
The leave on the Directory will show as the same colour for all members and all leave types, unless the person viewing leave that falls into one of the above circumstances.
To change the Leave Type colours
Go to Settings, Leave.
Edit (pencil in a square) the Leave Type you want to change.
Click the coloured square under Colour.
Select the colour.
Click Save.