Examine source code of rdm-world theme

{
  "theme": {
    "images": {
      "theme_frame": "rdm-persona-header10.png"
    },
    "colors": {
      "frame": "#73daff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "rdm-world theme",
  "manifest_version": 2,
  "description": "Created this for the readers of my blog - <a href=\"https://outgoing.prod.mozaws.net/v1/12944f3f9509f1cc8d1fe8da196a704a5bf286c8cdc3f70ca10bf4b30522ace6/http%3A//www.rdm-world.com\" rel=\"nofollow\">www.rdm-world.com</a> - and just to test this new feature ;)."
}