diff --git a/modules/river/hm.nix b/modules/river/hm.nix
index d202fb5c..a89bd336 100644
--- a/modules/river/hm.nix
+++ b/modules/river/hm.nix
@@ -6,14 +6,14 @@
   config = lib.mkIf (config.stylix.enable && config.stylix.targets.river.enable) {
     wayland.windowManager.river.settings =
       let
-        inherit (config.lib.stylix) colors;
+        inherit (config.lib.stylix) colors mkHexColor;
         inherit (config.stylix) cursor;
       in
       {
-        border-color-focused = "0x${colors.base0D}";
-        border-color-unfocused = "0x${colors.base03}";
-        border-color-urgent = "0x${colors.base08}";
-        background-color = "0x${colors.base00}";
+        border-color-focused = mkHexColor colors.base0D;
+        border-color-unfocused = mkHexColor colors.base03;
+        border-color-urgent = mkHexColor colors.base08;
+        background-color = mkHexColor colors.base00;
         xcursor-theme = lib.mkIf (
           config.stylix.cursor != null
         ) "${cursor.name} ${toString cursor.size}";