Examine source code of A Rainy Day

{
  "theme": {
    "images": {
      "theme_frame": "ARainyDayHCustom.jpg"
    },
    "colors": {
      "frame": "#003399",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "A Rainy Day",
  "manifest_version": 2,
  "description": "blue, rain, sky, clouds, April, showers, raining, spring, Northwest, Washington,"
}