Geary sidebar has the wrong color in v4.9

[inthreedee]

Prerequisites

• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.

Checklist to make sure the issue is not on your end

• I have made sure that I do not have multiple versions of the theme installed. Only one version should be installed in either ~/.local/share/themes or /usr/share/themes or ~/.themes
• The file ~/.config/gtk-3.0/gtk.css does not exist. (If it does, backup and remove it.)
• I have logged out and in again.
• Dark theme only. I have enabled adw-gtk3-dark in gnome-tweaks AND set the appearance to dark in gnome-control-center
• The flatpak theme is installed org.gtk.Gtk3theme.adw-gtk3 and org.gtk.Gtk3theme.adw-gtk3-dark
• The app I'm having an issue with is an actual GTK3 app and is not coded using another toolkit like GTK2, GTK4, QT, etc.
• I have created a new user profile without any modifications except adw-gtk3.

Description

With adw-gtk3 v4.9, Geary's sidebar does not use the correct background color for my theme. Downgrading to 4.8 and restarting Geary fixes the issue.

I am using Gradience v0.4.1 to apply the Catppuccin Mocha Lavender theme.

v4.8 with the correct theme colors:

v4.9 with the incorrect, default Adwaita background color in the sidebar:

OS and version [e.g Fedora 37]

Arch

Adw-gtk3 version. Also specify your installation source. [e.g tar.xz, AUR, git main branch]

4.9/git installed from AUR

GNOME version

44.4

Application name and version (If the issue is with an app.)

Geary v44.1, Gradience v0.4.1

[lassekongo83]

The value for sidebars are now sidebar_bg_color. So add @define-color sidebar_bg_color your_color; to ~/.config/gtk-3.0/gtk.css or wait for a Gradience update to include support for that.

There's also sidebar_fg_color, sidebar_backdrop_color, and sidebar_shade_color.

[inthreedee]

@lassekongo83 I'll pass that info along to the Gradience team. Thank you very much!