diff --git a/extensions/theme-defaults/themes/dark_vs.json b/extensions/theme-defaults/themes/dark_vs.json
index 8bdf64941e8..52767b116e7 100644
--- a/extensions/theme-defaults/themes/dark_vs.json
+++ b/extensions/theme-defaults/themes/dark_vs.json
@@ -283,7 +283,9 @@
 		{
 			"scope": [
 				"keyword.operator.new",
-				"keyword.operator.expression"
+				"keyword.operator.expression",
+				"keyword.operator.cast",
+				"keyword.operator.sizeof"
 			],
 			"settings": {
 				"foreground": "#569cd6"
diff --git a/extensions/theme-defaults/themes/hc_black.json b/extensions/theme-defaults/themes/hc_black.json
index 2a55b310398..da68ec213f1 100644
--- a/extensions/theme-defaults/themes/hc_black.json
+++ b/extensions/theme-defaults/themes/hc_black.json
@@ -263,7 +263,12 @@
 			}
 		},
 		{
-			"scope": ["keyword.operator.new", "keyword.operator.expression"],
+			"scope": [
+				"keyword.operator.new",
+				"keyword.operator.expression",
+				"keyword.operator.cast",
+				"keyword.operator.sizeof"
+			],
 			"settings": {
 				"foreground": "#569cd6"
 			}
diff --git a/extensions/theme-defaults/themes/light_vs.json b/extensions/theme-defaults/themes/light_vs.json
index 4c3161f434a..b9a1935eb84 100644
--- a/extensions/theme-defaults/themes/light_vs.json
+++ b/extensions/theme-defaults/themes/light_vs.json
@@ -299,7 +299,9 @@
 		{
 			"scope": [
 				"keyword.operator.new",
-				"keyword.operator.expression"
+				"keyword.operator.expression",
+				"keyword.operator.cast",
+				"keyword.operator.sizeof"
 			],
 			"settings": {
 				"foreground": "#0000ff"