Appearance

openpicker's own UI (the popup, the options page, and the picker sidebar) supports three themes:

Theme	Behavior
Light	Always light.
Dark	Always dark.
System (default)	Follows your operating system's light/dark setting, live.

The choice is stored once and applied to every surface.

Where to set it

• Popup — a quick Light / Dark / System toggle in the footer (one click from the toolbar).
• Options page — an Appearance section with the same control plus labels.

Both write the same setting, so changing it in one place updates the other immediately. The picker sidebar simply follows your choice.

TIP

This theme controls openpicker's interface only — it never changes the websites you pick on.