Add Manifest and theme-color – PropellerMind Blog

<meta name="theme-color" content="#1B222B" />
<link rel="manifest" href="manifest.json" />

manifest.json example:

{
"short_name": "BrunoOpitz",
"name": "BrunoOpitz",
"icons": [
{
  "src": "img/icons-192.png",
  "type": "image/png",
  "sizes": "192x192",
  "purpose": "maskable"
},
{
  "src": "img/icons-512.png",
  "type": "image/png",
  "sizes": "512x512"
}
],	
"start_url": "index.html",
"background_color": "#1B222B",
"display": "standalone",
"scope": "/",
"theme_color": "#1B222B",
"description": "Bruno Opitz Builds: Custom Websites, Web Apps, E-Commerce & SEO, Design & Animation"
}