Examine source code of The King in Yellow

{
  "theme": {
    "images": {
      "theme_frame": "Yellowsignheader1.jpg"
    },
    "colors": {
      "frame": "#ffff00",
      "tab_background_text": "#ffff00"
    }
  },
  "version": "2.0",
  "name": "The King in Yellow",
  "manifest_version": 2,
  "description": "Lovecraft inspired."
}