Running Individual Applications with Different Themes

Directories

• Themes directory /usr/share/themes
• Applications
  • Local ~/.local/share/applications
  • Global /usr/share/applications

Example

• Copy .desktop file from global dir to local to override desktop entry
• Make edit:

...
Comment[zh_HK]=編輯文字檔
Comment[zh_TW]=編輯文字檔
Exec=env GTK_THEME=Adwaita:dark gedit %U
Terminal=false
Type=Application
...

• Restart Shell Alt+F2 + "r"

Source