[gtk] Adwaita: make insensitive slightly less sensitive

[Jakub Steiner <jimmac src gnome org>]

commit bf3ccaa1bfb8d1bedb019a7057c01cf2d06eee89
Author: Jakub Steiner <jimmac gmail com>
Date:   Thu Mar 26 15:35:01 2020 +0100

    Adwaita: make insensitive slightly less sensitive
    
    - will expose itself even more in HC

 gtk/theme/Adwaita/_colors.scss |  2 +-
 gtk/theme/Adwaita/_common.scss | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_colors.scss b/gtk/theme/Adwaita/_colors.scss
index c565f706b0..039c1e0515 100644
--- a/gtk/theme/Adwaita/_colors.scss
+++ b/gtk/theme/Adwaita/_colors.scss
@@ -50,7 +50,7 @@ $drop_target_color: #4e9a06;
 //insensitive state derived colors
 $insensitive_fg_color: mix($fg_color, $bg_color, 50%);
 $insensitive_bg_color: mix($bg_color, $base_color, 60%);
-$insensitive_borders_color: $borders_color;
+$insensitive_borders_color: mix($borders_color, $bg_color, 80%);
 
 //colors for the backdrop state, derived from the main colors.
 $backdrop_base_color: if($variant == 'light', darken($base_color, 1%), lighten($base_color, 1%));
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index bbb9029ce7..78d5c468cb 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -2520,14 +2520,20 @@ treeview.view radio:selected { &:focus, & { @extend %radio; }} // This is a work
   border-radius: 3px;
   background-color: $dark_fill;
 
-  &:disabled { background-color: $insensitive_bg_color; }
+  &:disabled {
+   background-color: $insensitive_bg_color;
+   borders-color: $insensitive_borders_color;
+  }
 
   &:backdrop {
     background-color: $backdrop_dark_fill;
     border-color: $backdrop_borders_color;
     transition: $backdrop_transition;
 
-    &:disabled { background-color: $insensitive_bg_color; }
+    &:disabled {
+      background-color: $insensitive_bg_color;
+      borders-color: $insensitive_borders_color;
+    }
   }
 
   // ...on selected list rows