Examine source code of FDF4ever

{
  "theme": {
    "images": {
      "theme_frame": "FF-FDF-top.jpg"
    },
    "colors": {
      "frame": "#8a7e6d",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "FDF4ever",
  "manifest_version": 2,
  "description": "Frivilligt Drenge- og pige Forbund\nFDF is one of the largest Christian organizations for children and youth in Denmark."
}