diff --git a/gen/config.py b/gen/config.py
index b7defd613..cb07f2f58 100755
--- a/gen/config.py
+++ b/gen/config.py
@@ -45,11 +45,15 @@ def main(args: list[str]=sys.argv) -> None:
     all_colors = []
     for opt in definition.iter_all_options():
         if callable(opt.parser_func):
-            if opt.parser_func.__name__ in ('to_color_or_none', 'cursor_text_color'):
-                nullable_colors.append(opt.name)
-                all_colors.append(opt.name)
-            elif opt.parser_func.__name__ in ('to_color', 'titlebar_color', 'macos_titlebar_color', 'scrollbar_color'):
-                all_colors.append(opt.name)
+            match opt.parser_func.__name__:
+                case 'to_color':
+                    all_colors.append(opt.name)
+                case 'macos_titlebar_color' | 'titlebar_color' | 'scrollbar_color':
+                    all_colors.append(opt.name)
+                case 'to_color_or_none' | 'cursor_text_color':
+                    nullable_colors.append(opt.name)
+                    all_colors.append(opt.name)
+
     patch_color_list('tools/cmd/at/set_colors.go', nullable_colors, 'NULLABLE')
     patch_color_list('tools/themes/collection.go', all_colors, 'ALL')
     nc = ',\n    '.join(f'{x!r}' for x in nullable_colors)