By default, any custom theme will be based on the legacy light theme. To use the TriliumNext theme instead, add the #appThemeBase=next attribute onto the existing theme. The appTheme attribute must also be present.

The appThemeBase label can be set to one of the following values:

• next, for the TriliumNext (auto light or dark mode).
• next-light, for the always light mode of the TriliumNext.
• next-dark, for the always dark mode of the TriliumNext.
• Any other value is ignored and will use the legacy white theme instead.

Overrides

Do note that the TriliumNext theme has a few more overrides than the legacy theme, so you might need to suffix !important if the style changes are not applied.

:root {
	--launcher-pane-background-color: #0d6efd !important;
}