Case Management can be shown in a light or a dark colour scheme. Dark is easier on the eyes in a dim room or on an evening shift; light is usually better in a bright office or when you are projecting a screen in a meeting.
Change it
Select your name or initials at the top right to open the account menu.
Find Appearance:.
Choose Light, Dark or System. The current choice has a tick beside it.
The screen changes immediately. There is nothing to save.
What "System" does
System follows your device: if your phone or computer switches to dark in the evening, Case Management switches with it. It is the default, so if the app has ever gone dark on you unexpectedly, this is why — your device changed, not your account.
The setting belongs to the browser, not your account
Your choice is remembered in the browser you made it in. That has two practical consequences:
Sign in on a different computer, a different browser or a private window and you get the default (System) again — set it once more there.
Clearing your browser's site data resets it.
It is not a Joy-wide preference, and colleagues sharing a computer profile share the setting.
If something looks wrong in dark mode
Everything in Case Management is built to be readable in both schemes. If you find a screen where text is hard to read or a colour is doing something odd, switch to Light to carry on working and tell us with the Send feedback button — a screenshot in the report is exactly what is needed.