diff --git a/common/gtk-3.0/3.18/gtk-contained-dark.css b/common/gtk-3.0/3.18/gtk-contained-dark.css
index 1bf53d7..a88f858 100644
--- a/common/gtk-3.0/3.18/gtk-contained-dark.css
+++ b/common/gtk-3.0/3.18/gtk-contained-dark.css
@@ -2433,8 +2433,7 @@ GtkCalendar {
   GtkCalendar:inconsistent {
     color: alpha(currentColor,0.55); }
   GtkCalendar.highlight {
-    color: #D3DAE3;
-    background-color: rgba(43, 46, 57, 0.5); }
+    color: #D3DAE3; }
 
 /***********
  * Dialogs *
diff --git a/common/gtk-3.0/3.18/gtk-contained-darker.css b/common/gtk-3.0/3.18/gtk-contained-darker.css
index 78f2c82..00d3ffc 100644
--- a/common/gtk-3.0/3.18/gtk-contained-darker.css
+++ b/common/gtk-3.0/3.18/gtk-contained-darker.css
@@ -2436,8 +2436,7 @@ GtkCalendar {
   GtkCalendar:inconsistent {
     color: alpha(currentColor,0.55); }
   GtkCalendar.highlight {
-    color: #5c616c;
-    background-color: rgba(207, 214, 230, 0.5); }
+    color: #5c616c; }
 
 /***********
  * Dialogs *
diff --git a/common/gtk-3.0/3.18/gtk-contained-solid-dark.css b/common/gtk-3.0/3.18/gtk-contained-solid-dark.css
index e168abc..261a428 100644
--- a/common/gtk-3.0/3.18/gtk-contained-solid-dark.css
+++ b/common/gtk-3.0/3.18/gtk-contained-solid-dark.css
@@ -2433,8 +2433,7 @@ GtkCalendar {
   GtkCalendar:inconsistent {
     color: alpha(currentColor,0.55); }
   GtkCalendar.highlight {
-    color: #D3DAE3;
-    background-color: rgba(43, 46, 57, 0.5); }
+    color: #D3DAE3; }
 
 /***********
  * Dialogs *
diff --git a/common/gtk-3.0/3.18/gtk-contained-solid-darker.css b/common/gtk-3.0/3.18/gtk-contained-solid-darker.css
index c9ff5cf..f7062c4 100644
--- a/common/gtk-3.0/3.18/gtk-contained-solid-darker.css
+++ b/common/gtk-3.0/3.18/gtk-contained-solid-darker.css
@@ -2436,8 +2436,7 @@ GtkCalendar {
   GtkCalendar:inconsistent {
     color: alpha(currentColor,0.55); }
   GtkCalendar.highlight {
-    color: #5c616c;
-    background-color: rgba(207, 214, 230, 0.5); }
+    color: #5c616c; }
 
 /***********
  * Dialogs *
diff --git a/common/gtk-3.0/3.18/gtk-contained-solid.css b/common/gtk-3.0/3.18/gtk-contained-solid.css
index 969ed9c..5c646b3 100644
--- a/common/gtk-3.0/3.18/gtk-contained-solid.css
+++ b/common/gtk-3.0/3.18/gtk-contained-solid.css
@@ -2440,8 +2440,7 @@ GtkCalendar {
   GtkCalendar:inconsistent {
     color: alpha(currentColor,0.55); }
   GtkCalendar.highlight {
-    color: #5c616c;
-    background-color: rgba(207, 214, 230, 0.5); }
+    color: #5c616c; }
 
 /***********
  * Dialogs *
diff --git a/common/gtk-3.0/3.18/gtk-contained.css b/common/gtk-3.0/3.18/gtk-contained.css
index 64c3472..d9e204e 100644
--- a/common/gtk-3.0/3.18/gtk-contained.css
+++ b/common/gtk-3.0/3.18/gtk-contained.css
@@ -2440,8 +2440,7 @@ GtkCalendar {
   GtkCalendar:inconsistent {
     color: alpha(currentColor,0.55); }
   GtkCalendar.highlight {
-    color: #5c616c;
-    background-color: rgba(207, 214, 230, 0.5); }
+    color: #5c616c; }
 
 /***********
  * Dialogs *
diff --git a/common/gtk-3.0/3.18/sass/_common.scss b/common/gtk-3.0/3.18/sass/_common.scss
index efd4824..db4fb6c 100644
--- a/common/gtk-3.0/3.18/sass/_common.scss
+++ b/common/gtk-3.0/3.18/sass/_common.scss
@@ -2572,7 +2572,6 @@ GtkCalendar {
   &:inconsistent { color: gtkalpha(currentColor,0.55); }
   &.highlight {
     color: $fg_color;
-    background-color: transparentize($button_border, 0.5);
   }
 }