bug#46493: [feature/pgtk] Low contrast region face

[Yuuki Harano]

On Sun, 14 Feb 2021 13:00:59 +0000,
        "Basil L. Contovounesios" <contovob@tcd.ie> wrote:
> Note how Gedit's "region" takes on a different, much clearer colour.
> Could/should Emacs query GTK3 colours differently here?

Gedit doesn't know anything about coloring.

There is a widget class to edit a text in Gtk, and gedit only use it.
The widget class uses Gtk theming functions.
That is why gedit coloring is consistent with themes.

I looked for another way to get theme color, but nothing found.

-- 
Yuuki Harano