diff --git a/packages/node_modules/@node-red/editor-api/lib/editor/theme.js b/packages/node_modules/@node-red/editor-api/lib/editor/theme.js
index 2651660bf..61c6e9a7e 100644
--- a/packages/node_modules/@node-red/editor-api/lib/editor/theme.js
+++ b/packages/node_modules/@node-red/editor-api/lib/editor/theme.js
@@ -24,7 +24,10 @@ var defaultContext = {
     page: {
         title: "Node-RED",
         favicon: "favicon.ico",
-        tabicon: "red/images/node-red-icon-black.svg"
+        tabicon: {
+            icon: "red/images/node-red-icon-black.svg",
+            colour: "#8f0000"
+        }
     },
     header: {
         title: "Node-RED",
@@ -123,9 +126,13 @@ module.exports = {
             }
 
             if (theme.page.tabicon) {
-                url = serveFile(themeApp,"/tabicon/",theme.page.tabicon)
+                let icon = theme.page.tabicon.icon || theme.page.tabicon
+                url = serveFile(themeApp,"/tabicon/", icon)
                 if (url) {
-                    themeContext.page.tabicon = url;
+                    themeContext.page.tabicon.icon = url;
+                }
+                if (theme.page.tabicon.colour) {
+                    themeContext.page.tabicon.colour = theme.page.tabicon.colour
                 }
             }
 
diff --git a/packages/node_modules/@node-red/editor-client/templates/index.mst b/packages/node_modules/@node-red/editor-client/templates/index.mst
index 0fc2014c8..334e9f95e 100644
--- a/packages/node_modules/@node-red/editor-client/templates/index.mst
+++ b/packages/node_modules/@node-red/editor-client/templates/index.mst
@@ -23,7 +23,7 @@
 -->
 <title>{{ page.title }}</title>
 <link rel="icon" type="image/png" href="{{ page.favicon }}">
-<link rel="mask-icon" href="{{ page.tabicon }}" color="#8f0000">
+<link rel="mask-icon" href="{{ page.tabicon.icon }}" color="{{ page.tabicon.colour }}">
 <link rel="stylesheet" href="vendor/jquery/css/base/jquery-ui.min.css">
 <link rel="stylesheet" href="vendor/font-awesome/css/font-awesome.min.css">
 <link rel="stylesheet" href="red/style.min.css">