diff --git a/tools/skyx/bin/skyx.dart b/tools/skyx/bin/skyx.dart
index be5484eb815cc5617c6b646ed9e84731659be5e7..897e11ce473f3cd5e51a7a1178583c5d45fda3d7 100644
--- a/tools/skyx/bin/skyx.dart
+++ b/tools/skyx/bin/skyx.dart
@@ -11,7 +11,7 @@ import 'package:yaml/yaml.dart';
 
 const String kSnapshotKey = 'snapshot_blob.bin';
 const List<String> kDensities = const ['drawable-xxhdpi'];
-const List<String> kThemes = const ['white', 'black', 'grey600'];
+const List<String> kThemes = const ['white', 'black'];
 const List<int> kSizes = const [24];
 
 class Asset {