Examine source code of Radio Grenouille

{
  "theme": {
    "images": {
      "theme_frame": "radio_grenouille_header_banner.jpg"
    },
    "colors": {
      "frame": "#b3bcc2",
      "tab_background_text": "#222024"
    }
  },
  "version": "2.0",
  "name": "Radio Grenouille",
  "manifest_version": 2,
  "description": "Radio Grenouille : radio culturelle marseillaise."
}