Simplify some color management

home/programs.nix

@@ -17,6 +17,7 @@ in
       enable = true;
       config = {
         style = "auto";
+        theme = "base16-256";
       };
     };
     # Direnv, load and unload environment variables depending on the current directory.
@@ -26,30 +27,11 @@ in
       enable = true;
       nix-direnv.enable = true;
     };
-    # See `./shells.nix` for more on how this is used.
-    fish = {
-      functions = {
-        set-bat-colors = {
-          body = ''
-            if test "$term_background" = light
-              set -xg BAT_THEME "OneHalfLight"
-            else
-              set -xg BAT_THEME "OneHalfDark"
-            end
-          '';
-          onVariable = "term_background";
-        };
-      };
-      interactiveShellInit = ''
-        # Set `bat` colors based on value of `$term_backdround` when shell starts up.
-        set-bat-colors
-      '';
-    };
     helix = {
       enable = true;
       package = pkgs.helix-flake;
       settings = {
-        theme = "tokyonight";
+        theme = "base16_transparent";
         editor.indent-guides.render = true;
       };
     };