This uses the org.kde.kwin.ColorPicker interface.
5ab90f1a80 Add a kwin color picker
gtk/gtkcolorpickerkwin.c | 187 ++++++++++++++++++++++++++++++++++++++++
gtk/gtkcolorpickerkwinprivate.h | 41 +++++++++
gtk/meson.build | 1 +
3 files changed, 229 insertions(+)
Upstream: git.gnome.org