Examine source code of Coloured hearts

{
  "theme": {
    "images": {
      "theme_frame": "hearts1.jpg"
    },
    "colors": {
      "frame": "#00eeff",
      "tab_background_text": "#ff00fb"
    }
  },
  "version": "2.0",
  "name": "Coloured hearts",
  "manifest_version": 2,
  "description": "Fall in love ;P"
}