tanin-libadwaita

Fuji recolour for libadwaita / GTK4 — a light and a dark variant so the whole OS is covered. Recolours every libadwaita app (tsettings, thub, Nautilus, GNOME apps, …) by overriding Adwaita's named colors, and makes buttons/entries pill-shaped to match the bar and greeter.

Files

tanin-dark.css → /usr/share/tanin/libadwaita/tanin-dark.css
tanin-light.css → /usr/share/tanin/libadwaita/tanin-light.css
tanin-libadwaita → /usr/bin/tanin-libadwaita — switch script

Use

tanin-libadwaita dark     # or: light

Symlinks the variant to ~/.config/gtk-4.0/gtk.css and sets color-scheme + accent-color. A pre-existing real gtk.css is backed up to gtk.css.pre-tanin once.

Why named-color overrides (not a full theme)

libadwaita ignores gtk-theme-name; the supported way to restyle it is the user gtk.css, where overriding @define-color accent_color / window_bg_color / card_bg_color / … recolours all libadwaita apps at once. There are no CSS media queries, so light/dark is two files the switch script flips between.

Preview from the repo (isolated, no change to your config)

mkdir -p /tmp/t/gtk-4.0 && cp tanin-dark.css /tmp/t/gtk-4.0/gtk.css
XDG_CONFIG_HOME=/tmp/t cage -s -- gnome-text-editor   # or any libadwaita app

Palettes

Dark: bg #0f0f0f, fg #f0f0f0, accent #a39ec4 (Fuji violet).
Light: bg #f3f1ec, fg #2a2926, accent #6f67a8 (deeper violet for contrast).

Notes

App content that uses its own style scheme (e.g. gnome-text-editor's GtkSourceView syntax theme) is NOT controlled here — that's app-internal.
GTK3 apps (incl. eww) aren't covered by this; they use adw-gtk3 / their own CSS. A matching GTK3 Tanin theme could follow if wanted.