Examine source code of Commodore 64 Start Screen

{
  "theme": {
    "images": {
      "theme_frame": "personac64.png"
    },
    "colors": {
      "frame": "#f4f4f7",
      "tab_background_text": "#f4f4f7"
    }
  },
  "version": "2.0",
  "name": "Commodore 64 Start Screen",
  "manifest_version": 2,
  "description": "the grand C64 screen"
}