diff --git a/wp-content/themes/twentyfifteen/style.css b/wp-content/themes/twentyfifteen/style.css
index 31b71c34c1..ba6205b6f6 100644
--- a/wp-content/themes/twentyfifteen/style.css
+++ b/wp-content/themes/twentyfifteen/style.css
@@ -951,7 +951,7 @@ a:focus {
 }
 
 .post-navigation .has-post-thumbnail a:before {
-	background-color: rgba(0, 0, 0, 0.3);
+	background-color: rgba(0, 0, 0, 0.4);
 	content: "";
 	display: block;
 	height: 100%;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c1d1b6ece9..faee673617 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-alpha-30010';
+$wp_version = '4.1-alpha-30011';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.