use colloid gtk theme

home/all.nix

@@ -2,6 +2,7 @@
   config,
   pkgs,
   lib,
+  types,
   ...
 }:
 
@@ -216,6 +217,47 @@
     gtk = {
       enable = true;
 
+      theme =
+        let
+          mapping = {
+            maroon = "red";
+            red = "red";
+            peach = "orange";
+            yellow = "yellow";
+            green = "green";
+            teal = "teal";
+            sky = "teal";
+            sapphire = "default";
+            blue = "default";
+            mauve = "purple";
+            lavender = "purple";
+            pink = "pink";
+            flamingo = "pink";
+            rosewater = "pink";
+          };
+          rawThemeVariant = lib.attrByPath [ config.catppuccin.accent ] "default" mapping;
+          rawColorVariant = if config.userOptions.isDark then "dark" else "light";
+          capitalize =
+            s:
+            if s == "" then
+              ""
+            else
+              (lib.strings.toUpper (builtins.substring 0 1 s))
+              + (builtins.substring 1 (builtins.stringLength s) s);
+          formattedThemeColor = if rawThemeVariant == "default" then "" else "-${capitalize rawThemeVariant}";
+        in
+        {
+          name = "Colloid${formattedThemeColor}-${capitalize rawColorVariant}-Catppuccin";
+          package = (
+            pkgs.colloid-gtk-theme.override {
+              themeVariants = [ rawThemeVariant ];
+              sizeVariants = [ "standard" ];
+              colorVariants = [ rawColorVariant ];
+              tweaks = [ "catppuccin" ];
+            }
+          );
+        };
+
       iconTheme = {
         name = if config.userOptions.isDark then "Colloid-Dark" else "Colloid-Light";
         package = pkgs.colloid-icon-theme;

home/kde/plasma.nix

@@ -1,9 +1,6 @@
 { config, pkgs, ... }:
 
 {
-
-  gtk.theme.name = "Breeze";
-
   programs.plasma = {
     enable = true;
     overrideConfig = true;