finally caved and removed my redundant color scheme definition in the flake.nix file to use stylix's built-in color scheme definition

modules/home/environment/spicetify.nix

@@ -1,5 +1,6 @@
-{lib, config, pkgs, inputs, scheme ? {}, ... }: let
+{lib, config, pkgs, inputs, ... }: let
   spicePkgs = inputs.spicetify-nix.legacyPackages.${pkgs.system};
+  scheme = config.lib.stylix.colors;
 in {
   imports = [inputs.spicetify-nix.homeManagerModules.default];
   options = {

modules/home/environment/stylix.nix

@@ -1,4 +1,4 @@
-{lib, config, pkgs, scheme ? {}, wallpaper, ... }: {
+{lib, config, pkgs, ... }: {
   options = {
     stylixHomeConfig.enable = lib.mkEnableOption "enables my stylix Home-Manager options";
   };

modules/home/environment/waybar.nix

@@ -1,4 +1,4 @@
-{pkgs, scheme ? {}, host, lib, config, ...}:
+{pkgs, host, lib, config, ...}:
 
 let
   desktop = host == "oganesson";
@@ -22,6 +22,8 @@ let
         "eDP-1" = [1 2 3 4];
       };
   };
+
+  scheme = config.lib.stylix.colors;
   bg = {
     darkester = scheme.base00;
     darkest = scheme.base01;
@@ -435,7 +437,7 @@ in {
           }
 
           #custom-power {
-            color: #${colors.color0};
+            color: #${colors.color2};
             font-size: 18px;
           }
 
@@ -445,7 +447,7 @@ in {
           }
 
           #custom-reboot {
-            color: #${colors.color2};
+            color: #${colors.color0};
             font-size: 18px;
           }