Examine source code of Summer Bluebird

{
  "theme": {
    "images": {
      "theme_frame": "bluebird.jpg"
    },
    "colors": {
      "frame": "#a5d181",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Summer Bluebird",
  "manifest_version": 2,
  "description": "Pretty blue bird and summer lightplay. \nCC-ATTR credit to irwin of Flickr.\n( branch leaf foliage green yellow fresh spring summer rope blue bunting mexican jay bluetail warbler mountain mockingbird scrub pinyon merlin tree swallow grosbeak indigo bunting bud birds beak eye claw wing feather pretty feathers north american )"
}