For changing the controls to match the Humanity theme, I copied:
/usr/share/themes/Ambiant-MATE to: ~/.themes/Ambiant-MATE
Then inside these files:
gtk-3.0/gtk-main.cssgtk-3.0/settings.inigtk-2.0/gtkrc
Replace #87A752 (Ubuntu MATE’s green) with #F17949 (Ubuntu’s Orange), and re-log in for changes to take effect.
Alternatively, you could make the changes directly to /usr/share/themes/Ambiant-MATE so they apply for all users, but beware if these changes are reverted later due to updates/upgrades.
Just as reference:
- Ubuntu’s original “brown” theme is in
human-themeandhuman-icon-theme. - Ubuntu’s current Ambiance and Radiance theme is in
light-themes. - Applying the original Ambiance or Radiance theme directly in Ubuntu MATE will cause white panels / black text on the panels.