Examine source code of Notebook Toast

{
  "theme": {
    "images": {
      "theme_frame": "NotebookToastPersona.jpg"
    },
    "colors": {
      "frame": "#9e5f00",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Notebook Toast",
  "manifest_version": 2,
  "description": "This is from a drawing my friend made and which she sent, so I decided to try and make it into the persona.  GO TOAST!"
}