diff --git a/after/syntax/css/css3-colors.vim b/after/syntax/css/css3-colors.vim
index a7c9fa9..baf843b 100644
--- a/after/syntax/css/css3-colors.vim
+++ b/after/syntax/css/css3-colors.vim
@@ -1 +1,2 @@
+syn keyword cssColorProp contained opacity
 syn match cssColor contained "\<currentColor\>"
diff --git a/after/syntax/css/css3-properties.vim b/after/syntax/css/css3-properties.vim
index c36da93..347beb9 100644
--- a/after/syntax/css/css3-properties.vim
+++ b/after/syntax/css/css3-properties.vim
@@ -3,8 +3,6 @@ syn match cssBoxProp contained "\<box-shadow\>"
 
 syn match cssColorProp contained "\<background-\(origin\|clip\|size\)\>"
 
-syn keyword cssColorProp contained opacity
-
 syn match cssTextProp contained "\<text-\(shadow\|overflow\)\>"
 syn match cssTextProp contained "\<word-wrap\>"