MarsSeed [1] filed a deletion request for blueshift-tray [2]: Discontinued since 2015, repo archived. [a]
It was a Python2 and Gtk2 based config tray tool for blueshift (flux/redshift alternative). The latter is defunct since ~2016-2017 and whose development also stopped since 2017. [b] [a]: https://github.com/maandree/blueshift-tray [b]: https://github.com/maandree/blueshift [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/blueshift-tray/
