Examine source code of rainbow fractals

{
  "theme": {
    "images": {
      "theme_frame": "Untitled-1rfrac.jpg"
    },
    "colors": {
      "frame": "#080808",
      "tab_background_text": "#509bf2"
    }
  },
  "version": "2.0",
  "name": "rainbow fractals",
  "manifest_version": 2,
  "description": "rainbow fractals"
}