Examine source code of Radiant Skyline

{
  "theme": {
    "images": {
      "theme_frame": "radiantskylineheader.jpg"
    },
    "colors": {
      "frame": "#a8a6a6",
      "tab_background_text": "#f7f4f4"
    }
  },
  "version": "2.0",
  "name": "Radiant Skyline",
  "manifest_version": 2,
  "description": "A digital avatar out on the town...  It's a radiant city that we live in."
}