Examine source code of Ying Yang Blue

{
  "theme": {
    "images": {
      "theme_frame": "4-Blue.jpg"
    },
    "colors": {
      "frame": "#1c1c1c",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Ying Yang Blue",
  "manifest_version": 2,
  "description": "Artwork copyright Gillian Spencer (myfeveredimagination)"
}