GnomishGray

GnomishGray is a gray GTK3 and GNOME Shell theme, based on Adwaita, for those who prefer light GTK themes with neutral colors.

A GTK2 theme, based on Murrine, is also included but Murrine was not powerful enough to make GTK2 widgets very similar to GTK3 ones.

How to install?

http://www.softoware.net/apps/download-how-to-install-gnome-themes-in-ubuntu-for-linux.html

About GNOME:

GNOME is an international effort to build a complete desktop environment—the graphical user interface which sits on top of a computer operating system—entirely from free software. This goal includes creating software development frameworks, selecting application software for the desktop, and working on the programs which manage application launching, file handling, and window and task management.

GNOME is part of the GNU Project and can be used with various Unix-like operating systems, most notably Linux, and as part of Java Desktop System in Solaris.

The name originally stood for GNU Network Object Model Environment, though this acronym is deprecated. The GNOME project puts heavy emphasis on simplicity, usability, and making things “just work”.

What is new in this release:

• Update for GNOME 3.8.

What is new in version Mar 18 2013:

• Added support for Dash-to-Dock.

What is new in version Jan 23 2013:

• Updated for unexpected changes in GTK+-3.6.4 and Adwaita-3.6.2.

What is new in version Oct 26 2012:

• Fixed user avatar (new parameter for 3.6).
• Updated the Sushi tip in README.
• Fixed titlebar buttons and borders at last (buttons are level for all font sizes now).
• Sleeker scrollbars.
• Smoother Chromium top bar.

What is new in version Oct 13 2012:

• The theme is really for GNOME-3.6 now (new styles and fixes, tested on Fedora and Ubuntu).

What is new in version Oct 9 2012:

• Early update for GNOME-3.6.
• Fixed old issues in the gnome-shell theme.

What is new in version Sep 2 2012:

• These are the last changes before Gnome 3.6:
• Shinier GTK3 buttons with radial gradient.
• Set GtkLabel text color explicitly (fixes dconf-editor text).
• An elegant style for Sushi in README.

What is new in version Jul 21 2012:

• Transparent bg for all non-text views (good for file managers like Marlin).
• Just a bit shinier general gradient.
• Better non-top active tabs.

What is new in version Jul 6 2012:

• Now all notebooks have a shiny gradient.
• Fixed the color of app names in session end dialog.

Requirements:

• GTK+
• GNOME