Examine source code of foot ball rocks

{
  "theme": {
    "images": {
      "theme_frame": "Soccer2.jpg"
    },
    "colors": {
      "frame": "#66dfe3",
      "tab_background_text": "#66dfe3"
    }
  },
  "version": "2.0",
  "name": "foot ball rocks",
  "manifest_version": 2,
  "description": "this a foot ball theme"
}