diff --git a/common/fragments/graphical/theme.nix b/common/fragments/graphical/theme.nix
index 2b80c9e..0211b6c 100644
--- a/common/fragments/graphical/theme.nix
+++ b/common/fragments/graphical/theme.nix
@@ -11,7 +11,7 @@
     blue = { image = ../../../external/blue.jpg; };
     dark = {
       image = ../../../external/the_falls_by_night.jpg;
-      params = [ "--backend" "color-thief" ];
+      params = [ "--lighten" "0.5" ];
     };
     bridge = {
       image = ../../../external/the_bridge.png;
diff --git a/hosts/ritual/configuration.nix b/hosts/ritual/configuration.nix
index df479a0..5498e7b 100644
--- a/hosts/ritual/configuration.nix
+++ b/hosts/ritual/configuration.nix
@@ -55,7 +55,7 @@
     };
   };
 
-  environment.graphical.theme.name = "dark";
+  environment.graphical.theme.name = "blue";
 
   services.syncthing.dataDir = "/home/agatha/syncthing";