[gtk/wip/jimmac/error-labels-insensitive] Adwaita: error labels insensitive & backdrop states

[Jakub Steiner <jimmac src gnome org>]

commit aabb71359451c4d7a1986ec4c8eb6d27940c5d00
Author: Jakub Steiner <jimmac gmail com>
Date:   Mon Aug 17 10:00:29 2020 +0200

    Adwaita: error labels insensitive & backdrop states
    
    - address colored labels for the two states
    
    See https://gitlab.gnome.org/GNOME/gtk/-/issues/3063#note_891618

 gtk/theme/Adwaita/_common.scss | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 429bd371f0..11e14836df 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -178,7 +178,10 @@ label {
     > selection { @extend %selected_items_disabled; }
   }
 
-  &.error { color: $error_color; }
+  &.error {
+   color: $error_color;
+   &:disabled { color: $insensitive_fg_color; }
+  }
 }
 
 .dim-label {