Examine source code of Imperator

{
  "theme": {
    "images": {
      "theme_frame": "imperator_header.jpg"
    },
    "colors": {
      "frame": "#858585",
      "tab_background_text": "#1faed9"
    }
  },
  "version": "2.0",
  "name": "Imperator",
  "manifest_version": 2
}