Examine source code of dracula_singing

{
  "theme": {
    "images": {
      "theme_frame": "dracula_singing.jpg"
    },
    "colors": {
      "frame": "#fcf9f9",
      "tab_background_text": "#f2efef"
    }
  },
  "version": "2.0",
  "name": "dracula_singing",
  "manifest_version": 2,
  "description": "Bruno Pelletier"
}