Examine source code of Beck in Black

{
  "theme": {
    "images": {
      "theme_frame": "beck_persona_header2.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#a3a3a3"
    }
  },
  "version": "2.0",
  "name": "Beck in Black",
  "manifest_version": 2,
  "description": "My first persona. Fans of Beck, The Mongolian Chop Squad (and AC/DC), such as me, please enjoy!"
}