diff --git a/after/syntax/css/color-5.vim b/after/syntax/css/color-5.vim
index 525795c..9146819 100644
--- a/after/syntax/css/color-5.vim
+++ b/after/syntax/css/color-5.vim
@@ -1 +1 @@
-syn region cssFunction contained matchgroup=cssFunctionName start="\<\(color-\(mix\|contrast\|adjust\)\|red\|green\|blue\|alpha\|hue\|saturation\|lightness\|whiteness\|blackness\|a\|b\|chroma\)\s*(" end=")" contains=cssCustomProp,cssFunction,cssColor,cssFunctionComma oneline
+syn region cssFunction contained matchgroup=cssFunctionName start="\<color-\(mix\|contrast\)\s*(" end=")" contains=cssCustomProp,cssFunction,cssColor,cssFunctionComma oneline
diff --git a/test/test.css b/test/test.css
index 044ab22..01953aa 100644
--- a/test/test.css
+++ b/test/test.css
@@ -99,7 +99,6 @@
 .color-5 {
 	display: color-mix(red yellow 65%);
 	display: color-contrast(wheat tan, sienna, var(--myAccent), #d2691e);
-	display: color-adjust(peru lightness(-20%));
 }
 
 .color-adjust-1 {