Examine source code of Steampunk

{
  "theme": {
    "images": {
      "theme_frame": "webheader2.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#b8e0e3"
    }
  },
  "version": "2.0",
  "name": "Steampunk",
  "manifest_version": 2,
  "description": "Just a little something I put together in GIMP hope everyone likes it! "
}