diff --git a/CHANGES.md b/CHANGES.md
index 4f930a6e..6a04c72c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,9 @@
 # SVG-Edit CHANGES
 
-# ?
+# 4.0.1
 
 - Fix: Adjust side panel width checking based on device zoom (fixes #298)
+- Fix (regression): RGBColor
 
 # 4.0.0
 
diff --git a/dist/canvg.js b/dist/canvg.js
index 4689ed54..933f46fb 100644
--- a/dist/canvg.js
+++ b/dist/canvg.js
@@ -452,7 +452,7 @@ var canvg = (function (exports) {
         var bits = re.exec(colorString);
 
         if (bits) {
-          var _processor = processor(bits),
+          var _processor = processor.apply(void 0, _toConsumableArray(bits)),
               _processor2 = _slicedToArray(_processor, 3),
               r = _processor2[0],
               g = _processor2[1],
diff --git a/dist/extensions/ext-server_moinsave.js b/dist/extensions/ext-server_moinsave.js
index 528726ca..fbb826b4 100644
--- a/dist/extensions/ext-server_moinsave.js
+++ b/dist/extensions/ext-server_moinsave.js
@@ -452,7 +452,7 @@ var svgEditorExtension_server_moinsave = (function () {
         var bits = re.exec(colorString);
 
         if (bits) {
-          var _processor = processor(bits),
+          var _processor = processor.apply(void 0, _toConsumableArray(bits)),
               _processor2 = _slicedToArray(_processor, 3),
               r = _processor2[0],
               g = _processor2[1],
diff --git a/dist/extensions/ext-server_opensave.js b/dist/extensions/ext-server_opensave.js
index 0a62dad5..f25983e6 100644
--- a/dist/extensions/ext-server_opensave.js
+++ b/dist/extensions/ext-server_opensave.js
@@ -452,7 +452,7 @@ var svgEditorExtension_server_opensave = (function () {
         var bits = re.exec(colorString);
 
         if (bits) {
-          var _processor = processor(bits),
+          var _processor = processor.apply(void 0, _toConsumableArray(bits)),
               _processor2 = _slicedToArray(_processor, 3),
               r = _processor2[0],
               g = _processor2[1],
diff --git a/dist/jspdf.plugin.svgToPdf.js b/dist/jspdf.plugin.svgToPdf.js
index 8de202c4..290c8051 100644
--- a/dist/jspdf.plugin.svgToPdf.js
+++ b/dist/jspdf.plugin.svgToPdf.js
@@ -309,7 +309,7 @@
         var bits = re.exec(colorString);
 
         if (bits) {
-          var _processor = processor(bits),
+          var _processor = processor.apply(void 0, _toConsumableArray(bits)),
               _processor2 = _slicedToArray(_processor, 3),
               r = _processor2[0],
               g = _processor2[1],
diff --git a/editor/canvg/rgbcolor.js b/editor/canvg/rgbcolor.js
index 12e7594e..8e10a51b 100644
--- a/editor/canvg/rgbcolor.js
+++ b/editor/canvg/rgbcolor.js
@@ -206,7 +206,7 @@ export default class RGBColor {
     colorDefs.forEach(({re, process: processor}) => {
       const bits = re.exec(colorString);
       if (bits) {
-        const [r, g, b] = processor(bits);
+        const [r, g, b] = processor(...bits);
         Object.assign(this, {r, g, b});
         this.ok = true;
       }
diff --git a/package-lock.json b/package-lock.json
index 63a5c0d6..fbca1485 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "svgedit",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 02d3b807..d8a4717a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "svgedit",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "description": "Powerful SVG-Editor for your browser ",
   "main": "dist/index-umd.js",
   "module": "dist/index-es.js",