diff --git a/library/Icinga/Web/StyleSheet.php b/library/Icinga/Web/StyleSheet.php
index ab4e9d94c..d388f5924 100644
--- a/library/Icinga/Web/StyleSheet.php
+++ b/library/Icinga/Web/StyleSheet.php
@@ -26,7 +26,7 @@ class StyleSheet
      *
      * @var string
      */
-    const DEFAULT_MODE = 'dark';
+    const DEFAULT_MODE = 'none';
 
     /**
      * The themes that are compatible with the default theme
diff --git a/public/css/modes/dark.less b/public/css/modes/dark.less
deleted file mode 100644
index 9be5fef38..000000000
--- a/public/css/modes/dark.less
+++ /dev/null
@@ -1,5 +0,0 @@
-/* Icinga Web 2 | (c) 2021 Icinga GmbH | GPLv2+ */
-
-@enable-color-preference: 999999px;
-@prefer-light-color-scheme: 999999px;
-@prefer-dark-color-scheme: 0px;
diff --git a/public/css/modes/light.less b/public/css/modes/light.less
index d35545564..704400735 100644
--- a/public/css/modes/light.less
+++ b/public/css/modes/light.less
@@ -2,4 +2,3 @@
 
 @enable-color-preference: 999999px;
 @prefer-light-color-scheme: 0px;
-@prefer-dark-color-scheme: 999999px;
diff --git a/public/css/modes/none.less b/public/css/modes/none.less
index 790f01f63..05c618cdc 100644
--- a/public/css/modes/none.less
+++ b/public/css/modes/none.less
@@ -2,4 +2,3 @@
 
 @enable-color-preference: 999999px;
 @prefer-light-color-scheme: 999999px;
-@prefer-dark-color-scheme: 999999px;
diff --git a/public/css/modes/system.less b/public/css/modes/system.less
index b3b57b7b8..07bd06a8e 100644
--- a/public/css/modes/system.less
+++ b/public/css/modes/system.less
@@ -2,4 +2,3 @@
 
 @enable-color-preference: 0px;
 @prefer-light-color-scheme: 999999px;
-@prefer-dark-color-scheme: 999999px;