Examine source code of Midnighter - Sunset

{
  "theme": {
    "images": {
      "theme_frame": "Midnighter_Header.jpg"
    },
    "colors": {
      "frame": "#45494f",
      "tab_background_text": "#242426"
    }
  },
  "version": "2.0",
  "name": "Midnighter - Sunset",
  "manifest_version": 2,
  "description": "The Midnighter"
}