Step 1. Searching and Downloading Theme
First step you can go to GNOME-Look website to download themes, link here: http://www.gnome-look.org You can download any theme which says gtk 3.x in tar.gz format. So in a next step we have to install our theme.
Step 2. Extracting and Copying Theme
When you’re done with downloading your required theme for kali linux you need to extract the tar.gz file using terminal command.
Open up your terminal type:
tar - zxvf mytheme.tar.gz
When you done with extract, you have to move these files to this directory: /usr/share/themes/
Step 3. Installing Theme
Now, you are in installation step this will require you to install a tool which can be used to apply themes. Tool called “Gnome Tweak Tool” this tool comes with pre installed in kali linux 2x but in older version you can open up your terminal and install that tool.
Type in terminal: “
apt-get install gnome-tweak-tool“
Open the tweak tool and under the appearance tab you will find the themes section. Change GTK+ ,Icons , Shell theme to the downloaded theme and you l have the theme applied.