From 83ae267960c43fd085a78127acce9c37c9f1bc49 Mon Sep 17 00:00:00 2001
From: Jonathan Neal <jonathantneal@hotmail.com>
Date: Wed, 15 Apr 2020 08:39:53 -0400
Subject: [PATCH] Add hwb, lab, and lch to functions matching isColor

---
 lib/nodes/Func.js     | 4 ++--
 test/fixtures/func.js | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/nodes/Func.js b/lib/nodes/Func.js
index a4433de..aee5cf1 100644
--- a/lib/nodes/Func.js
+++ b/lib/nodes/Func.js
@@ -12,7 +12,7 @@ const { registerWalker } = require('../walker');
 
 const Container = require('./Container');
 
-const colorFunctions = ['hsl', 'hsla', 'rgb', 'rgba'];
+const colorFunctionsLowerRegex = /^(hsla?|hwb|lab|lch|rgba?)$/;
 const reVar = /^--[^\s]+$/;
 
 class Func extends Container {
@@ -105,7 +105,7 @@ class Func extends Container {
     const { lastNode } = parser;
     const lowerName = lastNode.name.toLowerCase();
     const { nodes } = node;
-    lastNode.isColor = colorFunctions.includes(lowerName);
+    lastNode.isColor = colorFunctionsLowerRegex.test(lowerName);
     lastNode.isVar = lowerName === 'var' && nodes.length && reVar.test(nodes[0].value);
   }
 }
diff --git a/test/fixtures/func.js b/test/fixtures/func.js
index 05d1b0d..9d22405 100644
--- a/test/fixtures/func.js
+++ b/test/fixtures/func.js
@@ -25,6 +25,9 @@ module.exports = {
     'rgba( 29, 439 , 29 )',
     'RGBA( 29, 439 , 29 )',
     'RgBa( 29, 439 , 29 )',
+    'Lab( 40%  56.6   39 )',
+    'lCH(40% 68.8 34.5 / 50%)',
+    'hwb(90deg 0% 0% / 0.5)',
     'calc(-0.5 * var(foo))',
     'calc(1px + -2vw - 4px)',
     'calc(((768px - 100vw) / 2) - 15px)',