diff --git a/Syntaxes/Less.sublime-syntax b/Syntaxes/Less.sublime-syntax
index 75c71d4..088ea2e 100644
--- a/Syntaxes/Less.sublime-syntax
+++ b/Syntaxes/Less.sublime-syntax
@@ -306,6 +306,16 @@ contexts:
     - include: calc-functions
     - include: var-functions
 
+  hsl-color-function-arguments-list-body:
+    - meta_content_scope: meta.function-call.arguments.css meta.group.css
+    - include: alpha-delimiters
+    - include: other-function-arguments-list-body
+
+  rgb-color-function-arguments-list-body:
+    - meta_content_scope: meta.function-call.arguments.css meta.group.css
+    - include: alpha-delimiters
+    - include: other-function-arguments-list-body
+
   url-function-arguments-list-body:
     - meta_content_scope: meta.function-call.arguments.css meta.group.css
     - include: css-function-arguments-prototype
diff --git a/tests/syntax_test_css.less b/tests/syntax_test_css.less
index 5a3ece6..90166f4 100644
--- a/tests/syntax_test_css.less
+++ b/tests/syntax_test_css.less
@@ -2733,11 +2733,11 @@
     /* note: we can't distinguish operators from alpha-separator; */
     color: hwb(0 100% 50% / 1.0);
 /*         ^^^ support.function.color.css */
-/*                        ^ keyword.operator.arithmetic.less */
+/*                        ^ punctuation.separator.alpha.css */
 
     color: lab(0% 0 0 / 1.0);
 /*         ^^^ support.function.color.css */
-/*                    ^ keyword.operator.arithmetic.less */
+/*                    ^ punctuation.separator.alpha.css */
 
     color: lch(0% 0.0 0.0 / 1.0);
 /*         ^^^ support.function.color.css */
@@ -2745,7 +2745,7 @@
 /*             ^ constant.numeric.value.css */
 /*                ^^^ meta.number.float.decimal.css constant.numeric.value.css */
 /*                    ^^^ meta.number.float.decimal.css constant.numeric.value.css */
-/*                        ^ keyword.operator.arithmetic.less */
+/*                        ^ punctuation.separator.alpha.css */
 /*                          ^^^ meta.number.float.decimal.css constant.numeric.value.css */
 
     color: lch(20% 10% 20grad / 100%);
@@ -2759,7 +2759,7 @@
 /*                     ^^^^^^ meta.number.integer.decimal.css */
 /*                     ^^ constant.numeric.value.css */
 /*                       ^^^^ constant.numeric.suffix.css */
-/*                            ^ keyword.operator.arithmetic.less */
+/*                            ^ punctuation.separator.alpha.css */
 /*                              ^^^^ meta.number.integer.decimal.css */
 /*                              ^^^ constant.numeric.value.css */
 /*                                 ^ constant.numeric.suffix.css */