Gruvbox GTK Theme

A GTK theme based on the colours of Sainnhe's great theme: Gruvbox Material for Neovim, the VinceLiuice's awesome: Magnetic GTK theme and the creativity of Ggusbemacbe's: Suru Plus Icon Theme.
Great to combine in your Gnome Desktop Environment and TWMs like: XmonadWM, AwesomeWM, BSPWM, etc... With support also for the desktop environments Cinnamon and XFCE.
You can check Reddit: r/unixporn to get some ideas.

Installing Themes

Before installing the themes, make sure to install the following necessary packages: sassc murrine-engine and gnome-themes-extra packages for the correct rendering of themes.

Here are some commands to install on some distributions:

On Fedora run:

 sudo dnf install gtk-murrine-engine sassc

On OpenSUSE run:

 sudo zypper install gtk2-engine-murrine sassc

On Arch run:

sudo pacman -S gtk-engine-murrine sassc

On Debian and derivatives run:

sudo apt install gtk2-engines-murrine sassc

The themes work on versions 40 to 46 of the GNOME D.E. just follow the steps below for installation:

Download the themes packs and extract them
Move the extracted files to the following paths:
- For GTK3: ~/.themes In this path you must move the entire theme folder.
- For GTK4: ~/.config/gtk-4.0 The files to move to this path can be found inside the theme directory in the gtk-4.0 folder, copy only the assets, gtk.css and gtk-dark.css files or create a symlinks.

Applying themes from zip files

For GTK3, apply themes from Gnome Tweaks.
For GTK4 applications it is only necessary to have moved the assets, gtk.css and gtk-dark.css files to the ~/.config/gtk-4.0 path, and if you notice that the theme has not been applied, just close and reopen the application.

Applying themes to Flatpak applications

Override flatpak themes to ~/.themes:

sudo flatpak override --filesystem=$HOME/.themes

Override flatpak icons to ~/.icons:

sudo flatpak override --filesystem=$HOME/.icons

Override flatpak themes to ~/.config/gtk-4.0 locally:

flatpak override --user --filesystem=xdg-config/gtk-4.0

Override flatpak themes to ~/.config/gtk-4.0 globally:

sudo flatpak override --filesystem=xdg-config/gtk-4.0

Alternative Flatpak Theming: stylepak

Manual Installation

Base theme default instructions

Run the following commands in the terminal:

./install.sh

Tip: ./install.sh allows the following options:

-d, --dest DIR          Specify destination directory (Default: ~/.themes)
-n, --name NAME         Specify theme name (Default: Tokyonight)
-t, --theme VARIANT...  Specify theme color variant(s) [default|purple|pink|red|orange|yellow|green|teal|grey|all] (Default: blue)
-c, --color VARIANT...  Specify color variant(s) [light|dark] (Default: All variants)
-s, --size VARIANT...   Specify size variant [standard|compact] (Default: standard variant)

-l, --libadwaita        Link installed gtk-4.0 theme to config folder for all libadwaita app use this theme

-r, --remove,
-u, --uninstall         Uninstall/Remove installed themes or links

--tweaks                Specify versions for tweaks
                        1. [medium|soft]       Medium|Soft| ColorSchemes version
                        2. black               Blackness color version
                        3. float               Floating gnome-shell panel style
                        4. outline             Windows with 2px outline style

-h, --help              Show help

For more information, run: ./install.sh --help

Clarifying some doubts

This is just to clarify doubts about the abbreviations of the Themes, as many found the names confusing.

Abbreviation example	Explanation of abbreviations
Theme-Name-B-MB	Theme with `Border` decoration and `macOS Buttons` in Windows
Theme-Name-B-LB	Theme with `Border` decoration and `Legacy Buttons` in Windows
Theme-Name-B-GS	Theme with `Border` decoration for `Gnome Shell`
Theme-Name-BL-MB	Theme `Borderless` decoration and `macOS Buttons` in Windows
Theme-Name-BL-LB	Theme `Borderless` decoration and `Legacy Buttons` in Windows
Theme-Name-BL-GS	Theme `Borderless` decoration for `Gnome Shell`

Looking for other themes with Neovim colour schemes?

Neovim Colorschemes for GTK	Source	Package
Catppuccin GTK Theme	Github	Pling
Everforest GTK Theme	Github	Pling
Gruvbox Material GTK Theme	Github	Pling
Kanagawa GTK Theme	Github	Pling
Material Deep Ocean GTK Theme	Github	Pling
Material Palenight GTK Theme	Github	Pling
Nightfox Dusk GTK Theme	Github	Pling
Rosé Pine GTK Theme	Github	Pling
Tokyonight GTK Theme	Github	Pling

Special thanks.

Thanks to @f1yn for the solution to the active and inactive borders in the new version of Cinnamon which no longer uses Metacity.

Thanks to @telometto for the alternative for the application of themes in Flatpak.

Support

Crandel/Gruvbox-GTK-Theme