diff --git a/modules/server/containers/apps/favicon.nix b/modules/server/containers/apps/favicon.nix
index 0395598..9b17a39 100644
--- a/modules/server/containers/apps/favicon.nix
+++ b/modules/server/containers/apps/favicon.nix
@@ -26,7 +26,10 @@ let
         paletteValue = lib.attrByPath [ value ] (throw "Unknown favicon color reference `${value}`") palette;
       in
       if builtins.isString paletteValue then
-        "#${paletteValue}"
+        if lib.hasPrefix "#" paletteValue then
+          paletteValue
+        else
+          "#${paletteValue}"
       else
         throw "favicon palette reference `${value}` must resolve to a string";
   normalizeProfile = profile: