Arc is a flat theme with transparent elements for GTK 3, GTK 2 and GNOME Shell which supports GTK 3 and GTK 2 based desktop environments like GNOME, Unity, Budgie, Pantheon, Xfce, MATE, etc.

elementary OS Note: elementary OS Freya users can install the package for Ubuntu 15.04, Loki users can install the package for Ubuntu 16.04.

AUR Note: If you're having trouble with the AUR packages please email the package maintainer at zach@zach-adams.com before creating an issue.

A non-transparent version of the theme is available here: Arc Solid OBS repo

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To build the theme the follwing packages are required

• autoconf
• automake
• pkg-config or pkgconfig for Fedora
• libgtk-3-dev for Debian based distros or gtk3-devel for RPM based distros
• git to clone the source directory

Note: For distributions which don't ship separate development packages, just the GTK 3 package is needed instead of the -dev packages.

For the theme to function properly, install the following

• GNOME Shell 3.14 - 3.24, GTK 3.14 - 3.22
• The gnome-themes-standard package
• The murrine engine. This has different names depending on the distro.
  • gtk-engine-murrine (Arch Linux)
  • gtk2-engines-murrine (Debian, Ubuntu, elementary OS)
  • gtk-murrine-engine (Fedora)
  • gtk2-engine-murrine (openSUSE)
  • gtk-engines-murrine (Gentoo)

Install the theme with the following commands

Clone the git repository with

git clone https://github.com/horst3180/arc-theme --depth 1 && cd arc-theme

./autogen.sh --prefix=/usr
sudo make install

Other options to pass to autogen.sh are

--disable-transparency     disable transparency in the GTK3 theme
--disable-light            disable Arc Light support
--disable-darker           disable Arc Darker support
--disable-dark             disable Arc Dark support
--disable-cinnamon         disable Cinnamon support
--disable-gnome-shell      disable GNOME Shell support
--disable-gtk2             disable GTK2 support
--disable-gtk3             disable GTK3 support
--disable-metacity         disable Metacity support
--disable-unity            disable Unity support
--disable-xfwm             disable XFWM support

--with-gnome=<version>     build the theme for a specific GNOME version (3.14, 3.16, 3.18, 3.20, 3.22)
                           Note 1: Normally the correct version is detected automatically and this
                           option should not be needed.
                           Note 2: For GNOME 3.24, use --with-gnome-version=3.22
                           (this works for now, the build system will be improved in the future)

After the installation is complete the theme can be activated with gnome-tweak-tool or a similar program by selecting Arc, Arc-Darker or Arc-Dark as Window/GTK+ theme and Arc or Arc-Dark as GNOME Shell/Cinnamon theme.

If the --disable-transparency option was used, the theme will be installed as Arc-solid, Arc-Darker-solid and Arc-Dark-solid.

Run

sudo make uninstall

from the cloned git repository, or

sudo rm -rf /usr/share/themes/{Arc,Arc-Darker,Arc-Dark}

A port of Arc for the Plasma 5 desktop with a few additions and extras. Available here.

A theme for Firefox is available at https://github.com/horst3180/arc-firefox-theme

The Arc icon theme is available at https://github.com/horst3180/arc-icon-theme

To install the Chrome/Chromium theme go to the extra/Chrome folder and drag and drop the arc-theme.crx or arc-dark-theme.crx file into the Chrome/Chromium window. The source of the Chrome themes is located in the source "Chrome/arc-theme" folder.

To install the Plank theme, copy the extra/Arc-Plank folder to ~/.local/share/plank/themes or to /usr/share/plank/themes for system-wide use. Now open the Plank preferences window by executing plank --preferences from a terminal and select Arc-Plank as the theme.

The Arc Dark theme for the Ubuntu Software Center by mervick can be installed from here. It solves readability issues with Arc Dark and the Ubuntu Software Center.

If you use Ubuntu with a newer GTK/GNOME version than the one included by default (i.e Ubuntu 14.04 with GTK 3.14 or Ubuntu 15.04 with GTK 3.16, etc.) the prebuilt packages won't work properly and the theme has to be installed manually as described above. This is also true for other distros with a different GTK/GNOME version than the one included by default

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If you get artifacts like black or invisible backgrounds under Unity, disable overlay scrollbars with

gsettings set com.canonical.desktop.interface scrollbar-mode normal

If you find a bug, please report it at https://github.com/horst3180/arc-theme/issues

Arc is available under the terms of the GPL-3.0. See COPYING for details.

_{Screenshot Details: Icons: Arc | Launcher Icons based on White Pixel Icons | Wallpaper | Font: Futura Bk bt}