I demonstrate how the new theme palettes work with the "semantic colour mappings" and how to override every single entry therein. This is a flexible and powerful mechanism that gives users near complete control over the looks of the theme. As such, I am deprecating user options that produced colour variations: they were not flexible and added to the complexity of the code base. The new version is in development (check the `version-4` branch). I plan to merge it into `main` in the coming days and formalise the release by the end of December 2022 or the beginning of January 2023. * * * Find all my publications (Emacs and more) on my website: https://protesilaos.com/