diff --git a/components/style/values/specified/box.rs b/components/style/values/specified/box.rs
index e30ea5215d0..3039a990ff9 100644
--- a/components/style/values/specified/box.rs
+++ b/components/style/values/specified/box.rs
@@ -1838,10 +1838,6 @@ pub enum Appearance {
     #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
     MozMacSourceListSelection,
     #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
-    MozMacVibrancyDark,
-    #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
-    MozMacVibrancyLight,
-    #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
     MozMacVibrantTitlebarDark,
     #[parse(condition = "ParserContext::in_ua_or_chrome_sheet")]
     MozMacVibrantTitlebarLight,
diff --git a/components/style/values/specified/color.rs b/components/style/values/specified/color.rs
index dc311680b36..d60f4801a11 100644
--- a/components/style/values/specified/color.rs
+++ b/components/style/values/specified/color.rs
@@ -329,8 +329,6 @@ pub enum SystemColor {
 
     /// Font smoothing background colors needed by the Mac OS X theme, based on
     /// -moz-appearance names.
-    MozMacVibrancyLight,
-    MozMacVibrancyDark,
     MozMacVibrantTitlebarLight,
     MozMacVibrantTitlebarDark,
     MozMacMenupopup,