Examine source code of Flock wallpaper

{
  "theme": {
    "images": {
      "theme_frame": "2.1-1.png"
    },
    "colors": {
      "frame": "#b8b1b1",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Flock wallpaper",
  "manifest_version": 2,
  "description": "Old flock wallpaper design art flowers orange black image"
}