update manifest theme

docs/manifest.json

@@ -41,6 +41,6 @@
 ],
   "start_url": "index.html",
   "display": "standalone",
-  "background_color": "#111",
-  "theme_color": "#fff"
+  "background_color": "#fefefe",
+  "theme_color": "#111"
 }

themes/infusion/static/manifest.json

@@ -41,6 +41,6 @@
 ],
   "start_url": "index.html",
   "display": "standalone",
-  "background_color": "#111",
-  "theme_color": "#fff"
+  "background_color": "#fefefe",
+  "theme_color": "#111"
 }