Examine source code of Lemons and acacia

{
  "theme": {
    "images": {
      "theme_frame": "lemons_header.jpg"
    },
    "colors": {
      "frame": "#f3c54f",
      "tab_background_text": "#ffffcc"
    }
  },
  "version": "2.0",
  "name": "Lemons and acacia",
  "manifest_version": 2,
  "description": "Unlike most of my photographs, this one was not taken in London but in Capena, Italy"
}