You can for example open the "update-manager.desktop" file located either in /usr/share/applications/ or ~/.local/share/applications with gedit and delete the line starting with "X-Unity-IconBackgroundColor". This gives you back the chameleonic colour for the specific launcher icon.
You can for example open the "update- manager. desktop" file located either in /usr/share/ applications/ or ~/.local/ share/applicati ons with gedit and delete the line starting with "X-Unity- IconBackgroundC olor". This gives you back the chameleonic colour for the specific launcher icon.