You can download them from my directory: https://www.dropbox.com/sh/khfxfpu3k917 ... Rh70a?dl=0
or direct links:
https://www.dropbox.com/s/0z61j9vbgi5nk ... r.gz?raw=1
https://www.dropbox.com/s/ydep7tmzwsnc6 ... r.gz?raw=1
To install, copy theme file
c-6-theme.tar.gzto your ~/.themes/ folder and icons file
c-6-icons.tar.gzto your ~/.icons/ folder. Open both files with Archive Manager and extract to their current directory. In “Appearance Preferences” > “Theme” tab, select new theme named c-6
It’s a GTK3 theme, so it’s designed to work with MATE 18.2, for MATE 17.3 you should only use the c-6 “Window Border”.
I’m also curious if MATE themes work in Cinnamon, can somebody try it?