Examine source code of easy-drinks

{
  "theme": {
    "images": {
      "theme_frame": "Kopfzeile.jpg"
    },
    "colors": {
      "frame": "#5c5555",
      "tab_background_text": "#c4baba"
    }
  },
  "version": "2.0",
  "name": "easy-drinks",
  "manifest_version": 2,
  "description": "Shake it easy!"
}