{
  "name": "Destiny Item Manager",
  "short_name": "DIM",
  "icons": [
    {
      "src": "/android-chrome-192x192-6-2018.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "/android-chrome-512x512-6-2018.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ],
  "theme_color": "#404141",
  "background_color": "#434444",
  "display": "standalone",
  "start_url": "/index.html?utm_source=homescreen"
}

{
  "name": "Destiny Item Manager",
  "short_name": "DIM",
  "icons": [
    {
      "src": "/android-chrome-192x192-6-2018.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "/android-chrome-512x512-6-2018.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ],
  "theme_color": "black",
  "background_color": "black",
  "display": "standalone",
  "start_url": "/index.html?utm_source=homescreen"
}

Change window chrome to black
Change window chrome to black