Examine source code of wiedo.nl spacetheme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#7521c4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "wiedo.nl spacetheme",
  "manifest_version": 2,
  "description": "Used the <a href=\"https://outgoing.prod.mozaws.net/v1/bc03329fb4a05bb0d13348041ec535e01d5128a2f62521a52e249cae06b861f2/http%3A//wiedo.nl\" rel=\"nofollow\">wiedo.nl</a> background to create a persona, feel like in space!"
}