diff --git a/after/syntax/css/values-4.vim b/after/syntax/css/values-4.vim
index f9760af..a506731 100644
--- a/after/syntax/css/values-4.vim
+++ b/after/syntax/css/values-4.vim
@@ -1,3 +1,3 @@
-syn match cssValueLength contained "[-+]\=\d\+\(\.\d*\)\=\(ic\|cap\|lh\|rlh\)"
+syn match cssValueLength contained "[-+]\=\d\+\(\.\d*\)\=\(rex\|cap\|rcap\|rch\|ic\|ric\|lh\|rlh\)"
 syn match cssValueLength contained "[-+]\=\d\+\(\.\d*\)\=\(s\|l\|d\)\=v\(h\|w\|i\|b\|min\|max\)"
 syn region cssFunction contained matchgroup=cssFunctionName start="\<\(mix\|min\|max\|clamp\|toggle\|round\|mod\|rem\|a\=\(sin\|cos\|tan\)\|atan2\|pow\|sqrt\|hypot\|log\|exp\|abs\|sign\)\s*(" end=")" oneline keepend
diff --git a/test/test.css b/test/test.css
index da4dfbe..458f271 100644
--- a/test/test.css
+++ b/test/test.css
@@ -1174,8 +1174,12 @@ view {
 .values-4 {
 	display: 1vi;
 	display: 1vb;
-	display: 1ic;
+	display: 1rex;
 	display: 1cap;
+	display: 1rcap;
+	display: 1rch;
+	display: 1ic;
+	display: 1ric;
 	display: 1lh;
 	display: 1rlh;
 	display: 1svh;