4chan Dark Mode

How do I turn on Dark Mode for 4chan?

4chan includes a built-in dark theme called Tomorrow.

1. Open any 4chan board.
2. Select Settings in the upper- or lower-right corner.
3. Open Miscellaneous.
4. Enable the Tomorrow theme.

Custom CSS

For a different color scheme, use the Custom CSS option in 4chan's settings. The built-in Tomorrow theme is the simplest option and does not require a browser extension.

Last verified: July 2026.