To apply role colors to party member display names, select System from the main menu and access the Character Configuration menu, then select the Display Name Settings tab from the column on the left. Under General, check the "Apply colors according to role" box in the Party Member Settings to enable this feature.

If you wish to assign new colors to each role, simply select the colored circle next to the role you wish to change, and a color palette menu will open. Once you have chosen your preferred colors, you may apply the changes.

* Role colors are only applicable during PvE duties.