diff --git a/src/main/gtk-3.0/gtk-Dark.css b/src/main/gtk-3.0/gtk-Dark.css
index 7e863368..d010a2d7 100644
--- a/src/main/gtk-3.0/gtk-Dark.css
+++ b/src/main/gtk-3.0/gtk-Dark.css
@@ -4942,14 +4942,12 @@ window.background.csd scrolledwindow.contacts-contact-form {
  * Epiphany (Gnome Web) *
  ************************/
 tabbox {
-  background-color: #2C2C2C;
-  box-shadow: inset 0 -1px rgba(255, 255, 255, 0.12);
-  padding: 3px 3px 0;
-}
-
-tabbox > tab {
-  border-radius: 6px 6px 0 0;
-  border-bottom: none;
+  background-color: rgba(255, 255, 255, 0.04);
+  border-radius: 0;
+  margin: 0;
+  padding: 3px 6px;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
+  background-clip: border-box;
 }
 
 tabbox > tab button {
diff --git a/src/main/gtk-3.0/gtk-Light.css b/src/main/gtk-3.0/gtk-Light.css
index b43075ff..dd40ca34 100644
--- a/src/main/gtk-3.0/gtk-Light.css
+++ b/src/main/gtk-3.0/gtk-Light.css
@@ -4933,14 +4933,12 @@ window.background.csd scrolledwindow.contacts-contact-form {
  * Epiphany (Gnome Web) *
  ************************/
 tabbox {
-  background-color: #FFFFFF;
-  box-shadow: inset 0 -1px rgba(0, 0, 0, 0.12);
-  padding: 3px 3px 0;
-}
-
-tabbox > tab {
-  border-radius: 6px 6px 0 0;
-  border-bottom: none;
+  background-color: rgba(0, 0, 0, 0.04);
+  border-radius: 0;
+  margin: 0;
+  padding: 3px 6px;
+  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
+  background-clip: border-box;
 }
 
 tabbox > tab button {
diff --git a/src/sass/gtk/apps/_gnome-3.0.scss b/src/sass/gtk/apps/_gnome-3.0.scss
index b461e88c..852cd263 100644
--- a/src/sass/gtk/apps/_gnome-3.0.scss
+++ b/src/sass/gtk/apps/_gnome-3.0.scss
@@ -757,14 +757,15 @@ window.background.csd {
  ************************/
 
 tabbox { // Gnome 40.0
-  background-color: $background;
-  box-shadow: inset 0 -1px $divider;
-  padding: ($space-size / 2) ($space-size / 2) 0;
+  background-color: $fill;
+  border-radius: 0;
+  margin: 0;
+  padding: $space-size / 2 $space-size;
+  border-bottom: 1px solid $border;
+  background-clip: border-box;
 
   > tab {
     @extend %tabs_tab;
-    border-radius: $corner-radius $corner-radius 0 0;
-    border-bottom: none;
 
     // close button
     button {