Examine source code of KOTT ver.3

{
  "theme": {
    "images": {
      "theme_frame": "1.jpg"
    },
    "colors": {
      "frame": "#826666",
      "tab_background_text": "#d9d4ca"
    }
  },
  "version": "2.0",
  "name": "KOTT ver.3",
  "manifest_version": 2,
  "description": "May be, it's a best version of my little experiment (i hope) ;))"
}