diff --git a/css/syntaxes.json b/css/syntaxes.json
index 82f6ec73..eb789396 100644
--- a/css/syntaxes.json
+++ b/css/syntaxes.json
@@ -11,9 +11,15 @@
   "alpha-value": {
     "syntax": "<number> | <percentage>"
   },
+  "anchor()": {
+    "syntax": "anchor( <anchor-name>? && <anchor-side>, <length-percentage>? )"
+  },
   "anchor-name": {
     "syntax": "<dashed-ident>"
   },
+  "anchor-size()": {
+    "syntax": "anchor-size( [ <anchor-name> || <anchor-size> ]? , <length-percentage>? )"
+  },
   "angle-percentage": {
     "syntax": "<angle> | <percentage>"
   },
@@ -320,6 +326,9 @@
   "final-bg-layer": {
     "syntax": "<'background-color'> || <bg-image> || <bg-position> [ / <bg-size> ]? || <repeat-style> || <attachment> || <box> || <box>"
   },
+  "fit-content()": {
+    "syntax": "fit-content( <length-percentage [0,∞]> )"
+  },
   "fixed-breadth": {
     "syntax": "<length-percentage>"
   },
@@ -584,6 +593,12 @@
   "offset-path": {
     "syntax": "<ray()> | <url> | <basic-shape>"
   },
+  "oklab()": {
+    "syntax": "oklab( [ <percentage> | <number> | none] [ <percentage> | <number> | none] [ <percentage> | <number> | none] [ / [<alpha-value> | none] ]? )"
+  },
+  "oklch()": {
+    "syntax": "oklch( [ <percentage> | <number> | none] [ <percentage> | <number> | none] [ <hue> | none] [ / [<alpha-value> | none] ]? )"
+  },
   "opacity()": {
     "syntax": "opacity( [ <number-percentage> ] )"
   },
@@ -629,6 +644,9 @@
   "palette-identifier": {
     "syntax": "<dashed-ident>"
   },
+  "palette-mix()": {
+    "syntax": "palette-mix(<color-interpolation-method> , [ [normal | light | dark | <palette-identifier> | <palette-mix()> ] && <percentage [0,100]>? ]#{2})"
+  },
   "path()": {
     "syntax": "path( [ <fill-rule>, ]? <string> )"
   },