diff --git a/overlays/catppuccin.nix b/overlays/catppuccin.nix
index 5980626..4bc397a 100644
--- a/overlays/catppuccin.nix
+++ b/overlays/catppuccin.nix
@@ -1,8 +1,11 @@
 {inputs, ...}: let
-  inherit (inputs.nixpkgs.lib) toHexString concatStrings;
+  inherit (inputs.nixpkgs.lib) toHexString concatStrings strings;
+  inherit (strings) fixedWidthString;
+
+  padHex = n: fixedWidthString 2 "0" (toHexString n);
 in {
-  toHex = color: concatStrings ["#" (toHexString color.red) (toHexString color.green) (toHexString color.blue)];
-  toHexNoHash = color: concatStrings [(toHexString color.red) (toHexString color.green) (toHexString color.blue)];
+  toHex = color: concatStrings ["#" (padHex color.red) (padHex color.green) (padHex color.blue)];
+  toHexNoHash = color: concatStrings [(padHex color.red) (padHex color.green) (padHex color.blue)];
   toRGB = color: concatStrings ["rgb(" (toString color.red) "," (toString color.green) "," (toString color.blue) ")"];
   toRGBA = color: a: concatStrings ["rgba(" (toString color.red) "," (toString color.green) "," (toString color.blue) "," (toString a) ")"];
 }