Examine source code of hummingbird_flower

{
  "theme": {
    "images": {
      "theme_frame": "humminbird_flower3.jpg"
    },
    "colors": {
      "frame": "#e3dcdc",
      "tab_background_text": "#040804"
    }
  },
  "version": "2.0",
  "name": "hummingbird_flower",
  "manifest_version": 2,
  "description": "hummingbird with geranium background"
}