Examine source code of Halestorm tribute

{
  "theme": {
    "images": {
      "theme_frame": "persona1.jpg"
    },
    "colors": {
      "frame": "#948f8f",
      "tab_background_text": "#0905f2"
    }
  },
  "version": "2.0",
  "name": "Halestorm tribute",
  "manifest_version": 2,
  "description": "a tribute to the awesome band Halestorm!"
}