diff --git a/src/main/gtk-3.0/gtk-dark-solid.css b/src/main/gtk-3.0/gtk-dark-solid.css
index 6ee75f3a..57b5a362 100644
--- a/src/main/gtk-3.0/gtk-dark-solid.css
+++ b/src/main/gtk-3.0/gtk-dark-solid.css
@@ -4797,6 +4797,10 @@ filechooser paned > separator:dir(rtl),
   margin-left: 120px;
 }
 
+.nautilus-window.background.csd > headerbar.titlebar > box.left.horizontal {
+  background-image: linear-gradient(0deg, #333333 0%, #333333 95%, transparent 95%, transparent 100%);
+}
+
 .nautilus-window.background.csd > grid.horizontal > paned.horizontal > box.vertical > placessidebar {
   border-bottom-left-radius: 14px;
 }
diff --git a/src/main/gtk-3.0/gtk-light-solid.css b/src/main/gtk-3.0/gtk-light-solid.css
index b98d9bf7..7208d73a 100644
--- a/src/main/gtk-3.0/gtk-light-solid.css
+++ b/src/main/gtk-3.0/gtk-light-solid.css
@@ -4818,6 +4818,10 @@ filechooser paned > separator:dir(rtl),
   margin-left: 120px;
 }
 
+.nautilus-window.background.csd > headerbar.titlebar > box.left.horizontal {
+  background-image: linear-gradient(0deg, #f0f0f0 0%, #f0f0f0 95%, transparent 95%, transparent 100%);
+}
+
 .nautilus-window.background.csd > grid.horizontal > paned.horizontal > box.vertical > placessidebar {
   border-bottom-left-radius: 14px;
 }
diff --git a/src/sass/gtk/_applications.scss b/src/sass/gtk/_applications.scss
index eebc1f2a..75b8acc8 100644
--- a/src/sass/gtk/_applications.scss
+++ b/src/sass/gtk/_applications.scss
@@ -109,6 +109,15 @@ filechooser,
       background-image: $nautilus_header_image;
 
       > .linked.raised > button:first-child { margin-left: $nautilus_sidebar_size - 80px; }
+
+      @if $trans == 'false' {
+        > box.left.horizontal {
+          background-image: linear-gradient(0deg, $dark_sidebar_bg 0%,
+                                        $dark_sidebar_bg 95%,
+                                        transparent 95%,
+                                        transparent 100%);
+        }
+      }
     }
 
     > grid.horizontal > paned.horizontal > box.vertical > placessidebar {