diff --git a/js/vue.config.js b/js/vue.config.js
index 0894cfd85..9fe37e46b 100644
--- a/js/vue.config.js
+++ b/js/vue.config.js
@@ -15,7 +15,7 @@ module.exports = {
     }
   },
   pwa: {
-    themeColor: "#abcdef", //not required for service worker, but place theme color here if manifest.json doesn't change the color
+    themeColor: "#000000", //not required for service worker, but place theme color here if manifest.json doesn't change the color
     workboxPluginMode: "InjectManifest",
     workboxOptions: {
       // swSrc is required in InjectManifest mode.