GTK3 Themes

Source (link to git-repo or to original if based on someone elses unmodified work):


A flat dark GTK-theme with ergonomic contrasts. It supports Gnome, Cinnamon, Xfce4, Mate and Openbox. Theme customizations for Firefox, Thunderbird and Inkscape are additionally included. Shades-of-gray is available in seven color variants:

• Gray
• Arch
• Cerulean
• Firebrick
• Harvest
• Orient
• Patina

The following description is contained in the individual theme folders.


• Arch Linux

You can install the AUR package:

• Last release: gtk-theme-shades-of-gray
• Git version: gtk-theme-shades-of-gray-git

• Manual Installation

Extract and copy the chosen theme folders either for personal use into directory '~/.themes/' or for common use into '/usr/share/themes/'.

Shades-of-gray can also be downloaded from GitHub.


Each theme folder contains an 'app-gadgets' directory with additional theme files for Thunderbird, Firefox and Inkspape.

• Thunderbird

The folder 'assets' and the file 'userChrome.css' in folder 'Thunderbird-Shades-of-gray' contain a Thunderbird theme adapted to Shades of gray. Copy both to this location:


If you change a Shades-of-gray theme color, it is not necessary to copy the file again. You can simply comment the current theme color in 'userChrome.css' (Thunderbird and Firefox) and uncomment the new theme color value.

• Thunderbird Calendar

Thunderbird‘s Calendar (formaly Lightning) uses its own bright colors in default setting. The option for using theme colors is hidden as 'Accessibility'.
Open the Thunderbird settings and activate the checkbox 'Optimize colors for accessibility' in calendar area.

• Firefox

userChrome.css: The file 'userChrome.css' in folder 'Firefox-Shades-of-gray' contains a theme adaption to Shades-of-gray. To enable the customizations, copy the file or its content to this location:


Note: You should choose the dark style in Firefox to get a consistent dark appearance.

userContent.css: Firefox uses widgets of the current GTK3 theme in websites that have not designed their own widgets for forms. With dark themes this is ugly and input fields, checkboxes etc. are difficult to use (e.g. black font in dark input fields). To fix this behavior the file 'userContent.css' contains color-neutral form widgets.

about.css: This file contains Shades-of-gray theme customizations for the Firefox 'about:' pages ('about:about' provides an overview for your current Firefox version).

Copy the files 'userContent.css' and 'about.css' to this location:


• Firefox add-ons

Bookmark search plus 2: The file 'bookmark-search-plus-2.css contains theme customizations for the very useful add-on Bookmark search plus 2 (AMO). Copy this file into your chrome directory:


Panorama Tab Groups: The file 'panorama-tab-groups.css' contains theme customizations for the recommended add-on Panorama Tab Groups (AMO). Copy this file in addition to 'userContent.css' into your chrome directory:


Note: in Panorama Tab Groups settings you can toggle between light and dark theme. The Shades-of-gray customizations only take effect with the dark theme.

Bookmarked Speed Dial: Bookmarked Speed Dial (AMO) is an add-on that offers similar functionality to Vivaldi Speed Dial.

The file 'bookmarked-speed-dial.css' contains a Shades-of-gray theme customization. Copy this file in addition to 'userContent.css' into your chrome directory:


The directory '../app-gadgets/Firefox-Shades-of-gray/bookmarked-speed-dial-images' contains images wich you can choose as 'Default dial image' and 'Default folder image' in the add-on options.

• Inkscape

Original colored icons in Inkscape are hard to identify in dark themes. The file 'icons.svg' in folder 'Inkscape-icons' contains bright icons. To use them in Inkscape, the file must be stored in this directory:


• Syntax Highlighting

Shades-of-gray includes the syntax color scheme Shades-of-pastel for several editors. By using pastel colors on dark background like pastel chalks on a blackboard the Shades-of-pastel scheme provides balanced and easy on eyes contrasts.

Currently Vim, GVim, Sublime-Text and editors with syntax highlighting based on 'GtkSourceView 3' or 'GtkSourceView 4' such as Gedit, Pluma. Xed and Mousepad are supported. Installation notes can be found in 'Shades-of-gray-Readme.html'.


• GTK+ 3.20 or above
• Pixmap theme engine
• Murrine theme engine


GNU General Public License GPL-3


Please report bugs, issues and feature requests on Github.
Last changelog:

1.1.7 8 days ago

• Thunderbird: Enigmail flat button text color forced (userChrome.css)
• Firefox add-on: background focus group header fixed (panorama-tab-groups.css)
• Firefox add-on: minor fix (bookmarked-speed-dial.css)
• Firefox 66+ home content: blue font in context menu fixed (userContent.css)
• Firefox: customizations identity-popup (userChrome.css)
• Firefox: CSS-code cleaned up (userContent.css, userChrome.css)
• New: Firefox - dark Shades-of-gray theme for 'about:' pages (about.css)


10 months ago

8 +Not bad - after the 'Yltra' theme stopped working...



10 months ago

8 +



10 months ago

I really like the looks of the theme but I am having problems resizing windows. When I move the cursor to a window boundary I am not getting "arrow plus bar" cursor and am not able to grab the window frame. I am running ubuntu 18.04 and don't have this problem with other themes. I am running with DMZ-White cursors via Gnome tweaks but have tried others. Perhaps I just need to tweak something else. Thanks.




10 months ago

Thank you for your bug report!
I had accidentally commented out a necessary instruction in gtk.css (line 4294). The bug is fixed now in 1.0.3.



10 months ago

Thanks for the fix. I'll be pounding on it for a while and will let you know if I find anything else.



10 months ago

8 +



10 months ago

Great post! I didn’t know about several of these resources and I’m going to go check them out now! wuxiaworld


1.1.7 8 days ago

• Thunderbird: Enigmail flat button text color forced (userChrome.css)
• Firefox add-on: background focus group header fixed (panorama-tab-groups.css)
• Firefox add-on: minor fix (bookmarked-speed-dial.css)
• Firefox 66+ home content: blue font in context menu fixed (userContent.css)
• Firefox: customizations identity-popup (userChrome.css)
• Firefox: CSS-code cleaned up (userContent.css, userChrome.css)
• New: Firefox - dark Shades-of-gray theme for 'about:' pages (about.css)

1.1.6 1 month ago

• New: Syntax scheme for Vim and GVim added (Shades-of-pastel)
• GNOME Shell 3.32: close buttons in dash overview adapted (gnome-shell.css)
• GTK3 workaround: gnome-control-center 3.32 ignores '@base_color' (gtk.css)
• Firefox add-on: 0.8.8 update (panorama-tab-groups.css)
• Firefox add-on: color '#searchtext' fixed (bookmark-search-plus-2.css)
• Firefox urlbar indicator: color for validated sites adjusted (userChrome.css)
• Firefox 66+: update CSS corrections for 'about' sites (userContent.css)

1.1.5 3 months ago

• GTK2: entry background color in HexChat fixed (apps.rc)
• GTK3: Gedit document-panel background color synchronized (gtk.css)
• Thunderbird: titles of unread messages are colored (userChrome.css)
• Firefox add-on theme: 2.0.52 update (bookmark-search-plus-2.css)
• Firefox: fallback webextension popup background added (userChrome.css)
• Firefox: width of vertical scrollbar in sidebar reduced (userChrome.css)
• Firefox add-on theme added: Bookmarked Speed Dial (bookmarked-speed-dial.css, userContent.css)
• Syntax color schemes for Sublime-Text, Gedit, Pluma, Xed, Mousepad added (Shades-of-pastel)

1.1.4 4 months ago

• GTK3, GTK2, Cinnamon, Gnome, Openbox: thin dark menu separator lines added
• GTK3: side effect Evolution-CSS in Rhythmbox fixed (gtk.css)
• Gnome: slider and barlevel fixed to version 3.29+ (gnome-shell.css)
• Gnome: better activities icon (gnome-shell.css)
• Gnome: panel less opacity (gnome-shell.css)
• Theme folder: Readme files superseded (new: Shades-of-gray-Readme.html)
• Firefox, Thunderbird: thin dark menu separator lines added (userChrome.css)
• Firefox: overflow submenu improved for add-on content (userChrome.css)
• Firefox: added options to hide context menu items (userChrome.css)
• Firefox add-on theme added: Panorama Tab Groups (panorama-tab-groups.css, userContent.css) 5 months ago

• Gnome: volume and brightness slider fixed (gnome-shell.css)

1.1.3 5 months ago

• Thunar, Nemo, Nautilus, Caja: list view improved (gtk.css)
• Firefox: minor adjustments in userChrome.css (places window)
• Firefox add-on theme added: Bookmark search plus 2 (bookmark-search-plus-2.css, userContent.css)

1.1.2 6 months ago

• Xfce4: panel adjusted to gtk3 in Xfce 4.13 (gtk.css)
• Xfwm4: window buttons supplemented (xfwm4)
• Evolution: sidebars adjusted (gtk.css)
• gThumb: sidebar and browser background improved (gtk.css)
• Calendar: gnome-calendar enhancements (gtk.css)
• Firefox: smaller identity box for extensions in urlbar (userContent.css)
• Firefox: menus in about:preferences fixed (userContent.css)
• Thunderbird, Lightning: Shades-of-gray icons added (userChrome.css, assets)

1.1.1 8 months ago

• Openbox: close button modified, window handle and menu improvements
• Thunderbird: minimum column width defined (userChrome.css)
• Lightning 6.2: bright navigation buttons (userChrome.css)
• Firefox: form widgets also adapted for moz-extensions (fixed in userContent.css)

1.1.0 9 months ago

• New: Theme for Cinnamon added
• GTK3: Minor changes
• Metacity: Updated for Cinnamon
• Thunderbird 60: Fixes and improvements
• Lightning: Theme adaptation improved
• Firefox: Fixes and further theme customizations 9 months ago

• Fix: gtk3-submenus are positioned closer to the parent menu
• New: Shades-of-gray-FAQ.html (2018-07-29)

1.0.4 9 months ago

• Thunderbird: added theme customizations for color tags in email tree view (userChrome.css)
• Borders and separators slightly less contrast (gtk-colors.css, gnome-shell.css)

1.0.3: 10 months ago

Bug fix: Window decorations of Gnome applications now correctly trigger a resize mouse pointer.

product-maker AV1Aca May 15 2019 9 excellent
9 excellent
product-maker hsmmouse Apr 08 2019 8 great
From my point of view, it is one of the best dark theme.
product-maker fjuwoeg Mar 25 2019 8 great
product-maker kooijman77 Mar 01 2019 8 great
+Favorite dark theme
product-maker charlie-henson Feb 17 2019 8 great
product-maker 442206 Jan 25 2019 8 great
+I love this theme
product-maker amorpher Jan 16 2019 8 great
+ My Favorite Theme for the last year. I use it with Newaita icons.
product-maker mockroot Jan 16 2019 8 great
product-maker jocixlinux Jan 16 2019 8 great
product-maker celphor Dec 25 2018 8 great
product-maker rcrittendon Dec 18 2018 8 great
+Fantastic Theme, awesome work, what a joy to use, thank you!
product-maker khandakershahi Dec 16 2018 8 great
+Nice Theme!
product-maker Franua Dec 15 2018 8 great
+Great theme! Soothing for eyes... Love it!
product-maker brique Nov 28 2018 8 great
product-maker sunaku Nov 04 2018 8 great
product-maker NOMIC82 Oct 28 2018 8 great
product-maker kamathln Oct 10 2018 8 great
+Finally a sane dark theme which is 1) is elegant 2) differentiable widgets 3) Easy on the eyes. If I ever make a distro, this will be the default GTK3+ theme
product-maker AbeTheAbe Sep 17 2018 8 great
+Chrome theme is not working properly, I would prefer the same color as the rest of theme ( gray) for top panel instead of black and this theme desperately needs the compact version, thanks!
product-maker Adyel Jul 31 2018 8 great
+ Great Theme, Easy on the eye.
product-maker 1E1E1E Jul 27 2018 8 great
product-maker scorici Jul 22 2018 8 great
product-maker intro18 Jul 21 2018 8 great
product-maker annoyingduck Jul 04 2018 8 great
+Most excellent work. Finally a suitable dark replacement. Running Arch w/XFCE, everything looks great so far.
product-maker ben2talk Jul 04 2018 8 great
+Not bad - after the 'Yltra' theme stopped working...
product-maker rafenator Jul 03 2018 8 great
product-maker nand Jun 29 2018 8 great
product-maker Count: 2 Rating: 5.0
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updated May 10 2019
added Jun 28 2018
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