[gnome-shell/wip/jimmac/light-theme-fixes] theme: System grey is global

[Jakub Steiner <jimmac src gnome org>]

commit 89968bf3430ecdbcb97fce76bdfba02ed55a0ba3
Author: Jakub Steiner <jimmac gmail com>
Date:   Mon Sep 5 16:11:48 2022 +0200

    theme: System grey is global
    
    - having system grey derived form the base color means having
      classic/light theme overview light/illegible

 data/theme/gnome-shell-sass/_colors.scss | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/theme/gnome-shell-sass/_colors.scss b/data/theme/gnome-shell-sass/_colors.scss
index c42a95543b..e8df3b5e9b 100644
--- a/data/theme/gnome-shell-sass/_colors.scss
+++ b/data/theme/gnome-shell-sass/_colors.scss
@@ -45,7 +45,7 @@ $card_bg_color: if($variant == 'light', darken($bg_color, 5%), lighten($bg_color
 $bubble_buttons_color: if($variant == 'light', darken($bg_color, 12%), lighten($bg_color, 10%));
 
 // overview background color
-$system_bg_color: $base_color;
+$system_bg_color: $_dark_base_color;
 
 //insensitive state derived colors
 $insensitive_fg_color: mix($fg_color, $bg_color, 50%);