Examine source code of Singing Summer

{
  "theme": {
    "images": {
      "theme_frame": "SongofsummerHCustom.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Singing Summer",
  "manifest_version": 2,
  "description": "birds, flowers, sky, sunflowers, singing, spring, cosmos, music,  cyan, turquoise, blue, aqua"
}