Examine source code of Musical Colors

{
  "theme": {
    "images": {
      "theme_frame": "heder.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#e3e3e3"
    }
  },
  "version": "2.0",
  "name": "Musical Colors",
  "manifest_version": 2,
  "description": "Music notes with colors.  Not much more to say haha"
}