I just released a little tool called Lipstick on a Pig that helps keep the visual appearance of supported command-line applications in sync with the current light/dark mode setting (colour scheme) of your system in GNOME. But why is this tool even necessary to begin with? Let’s start at the beginning… Getting to GNOME you The GNOME display environment1, since version 42, implements support for light and dark appearance styles (aka colour schemes).