Examine source code of Clouds over a lake

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#549bd1",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Clouds over a lake",
  "manifest_version": 2,
  "description": "This is a picture of clouds over a beautiful Ohrid lake."
}