diff --git a/after/syntax/css/filter-effects.vim b/after/syntax/css/filter-effects.vim
index c62ec30..87c113b 100644
--- a/after/syntax/css/filter-effects.vim
+++ b/after/syntax/css/filter-effects.vim
@@ -2,3 +2,5 @@ syn match cssFontProp contained "\<flood-\(color\|opacity\)\>"
 syn match cssFontProp contained "\<color-interpolation-filters\>"
 syn match cssFontProp contained "\<lighting-color\>"
 syn keyword cssFontAttr sRGB linearRGB
+
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(blur\|brightness\|contrast\|drop-shadow\|grayscale\|hue-rotate\|invert\|opacity\|saturate\|sepia\)\s*(" end=")" oneline keepend