Examine source code of Darkyellow Flowerart

{
  "theme": {
    "images": {
      "theme_frame": "darkyellow-flowerart.jpg"
    },
    "colors": {
      "frame": "#b8a82b",
      "tab_background_text": "#99731a"
    }
  },
  "version": "2.0",
  "name": "Darkyellow Flowerart",
  "manifest_version": 2,
  "description": "Yellow flowers... tulps, I believe"
}