diff --git a/css/leptonChrome.css b/css/leptonChrome.css
index 22aa1ed..25f149e 100644
--- a/css/leptonChrome.css
+++ b/css/leptonChrome.css
@@ -7658,7 +7658,7 @@
       > .tab-stack
       > .tab-background
       > .tab-context-line::before {
-      background-color: rgba(0, 0, 0, 0.2) !important;
+      background-color: rgba(0, 0, 0, 0.4) !important;
       opacity: 1 !important;
     }
     #TabsToolbar[brighttext]
@@ -7666,7 +7666,7 @@
       > .tab-stack
       > .tab-background
       > .tab-context-line::before {
-      background-color: rgba(255, 255, 255, 0.2) !important;
+      background-color: rgba(255, 255, 255, 0.4) !important;
     }
     /* Animation */
     @media (prefers-reduced-motion: no-preference) {
@@ -22505,7 +22505,7 @@
     > .tab-stack
     > .tab-background
     > .tab-context-line::before {
-    background-color: rgba(0, 0, 0, 0.2) !important;
+    background-color: rgba(0, 0, 0, 0.4) !important;
     opacity: 1 !important;
   }
   #TabsToolbar[brighttext]
@@ -22513,7 +22513,7 @@
     > .tab-stack
     > .tab-background
     > .tab-context-line::before {
-    background-color: rgba(255, 255, 255, 0.2) !important;
+    background-color: rgba(255, 255, 255, 0.4) !important;
   }
   /* Animation */
   /* Animation for hover effect */
diff --git a/css/leptonChromeESR.css b/css/leptonChromeESR.css
index 18012a2..ef9e5e4 100644
--- a/css/leptonChromeESR.css
+++ b/css/leptonChromeESR.css
@@ -8100,7 +8100,7 @@
       > .tab-stack
       > .tab-background
       > .tab-context-line::before {
-      background-color: rgba(0, 0, 0, 0.2) !important;
+      background-color: rgba(0, 0, 0, 0.4) !important;
       opacity: 1 !important;
     }
     #TabsToolbar[brighttext]
@@ -8108,7 +8108,7 @@
       > .tab-stack
       > .tab-background
       > .tab-context-line::before {
-      background-color: rgba(255, 255, 255, 0.2) !important;
+      background-color: rgba(255, 255, 255, 0.4) !important;
     }
     /* Animation */
     @media (prefers-reduced-motion: no-preference) {
diff --git a/src/tab/selected_tab/_supernova_like_contextline.scss b/src/tab/selected_tab/_supernova_like_contextline.scss
index b704843..32e0830 100644
--- a/src/tab/selected_tab/_supernova_like_contextline.scss
+++ b/src/tab/selected_tab/_supernova_like_contextline.scss
@@ -39,7 +39,7 @@ tabs tab.tabbrowser-tab[usercontextid] > .tab-stack > .tab-background > .tab-con
   > .tab-stack
   > .tab-background
   > .tab-context-line::before {
-  background-color: rgba(0, 0, 0, 0.2) !important;
+  background-color: rgba(0, 0, 0, 0.4) !important;
   opacity: 1 !important;
 }
 
@@ -48,7 +48,7 @@ tabs tab.tabbrowser-tab[usercontextid] > .tab-stack > .tab-background > .tab-con
   > .tab-stack
   > .tab-background
   > .tab-context-line::before {
-  background-color: rgba(255, 255, 255, 0.2) !important;
+  background-color: rgba(255, 255, 255, 0.4) !important;
 }