Ceti-2 is a theme designed for GTK-3, GTK-2, and Gnome Shell. It is dark theme with the white and blue combination based on Vertex theme which makes desktop more elegant. This theme is compatible with Unity, Gnome Shell, Gnome Classic, Gnome Fallback, Cinnamon, Mate, Budgie, Pantheon, and so on.
Vertex is a theme for GTK 3, GTK 2, Gnome-Shell and Cinnamon. It supports GTK 3 and GTK 2 based desktop environments like Unity, Gnome Shell, Gnome Classic, Gnome Fallback, Cinnamon, Mate, XFCE, Budgie, Pantheon, etc. Vertex theme comes with three variants to choose from. The default variant with dark header-bars, a light variant, and a dark variant.
Both themes uses same engine to render theme properly gnome-themes-standard package for GTK-3, Murrine and pixbuf engines for the GTK-2 theme. Since both themes are in active development, if you encounter any bug within these theme then report it to creator via linked page. Myelementary and Vertex icons used in following screenshots. You can use Unity Tweak ToolGnome-tweak-tool or Ubuntu-Tweak to change themes/icons.

ceti theme
Ceti GTK Theme

ceti gnome shell
Ceti Gnome Shell Theme

vertex theme
Vertex Theme

vertex dark
Vertex Dark Theme

vertex light
Vertex Light Theme

vertex gnome shell
Vertex Gnome Shell Theme

vertex cinnamon
Vertex Cinnamon Theme

>> Available for Ubuntu 15.10 Wily/15.04 Vivid/14.04 Trusty/Linux Mint 17.x/17/and other Ubuntu derivatives
To install Ceti-2 theme in Ubuntu/Linux Mint via PPA open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:


>> Available for Ubuntu 15.10 Wily/15.04 Vivid/14.04 Trusty/Linux Mint 17.x/17/and other Ubuntu derivatives
To install Vertex theme in Ubuntu/Linux Mint via PPA open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

That's it
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