generator-polymer-init-vaadin-elements-app/app/templates/manifest.json

Progressive web application template with Polymer App Toolbox and Vaadin Elements

{
  "name": "<%= name %>",
  "short_name": "<%= name %>",
  "start_url": "/",
  "display": "standalone",
  "theme_color": "#1576f3",
  "background_color": "#1576f3",
  "icons": [
    {
      "src": "images/manifest/icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "images/manifest/icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ]
}