Examine source code of Autumn Everning

{
  "theme": {
    "images": {
      "theme_frame": "leafevening.jpg"
    },
    "colors": {
      "frame": "#f2d30c",
      "tab_background_text": "#f7e6d2"
    }
  },
  "version": "2.0",
  "name": "Autumn Everning",
  "manifest_version": 2,
  "description": "Autumn Leaves against the evening horizon."
}