Examine source code of munster_germany_oldmap

{
  "theme": {
    "images": {
      "theme_frame": "sus_munster_ger_1550_64_b-Copy.jpg"
    },
    "colors": {
      "frame": "#050505",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "munster_germany_oldmap",
  "manifest_version": 2,
  "description": "Old Map"
}