Examine source code of King Crimson Red

{
  "theme": {
    "images": {
      "theme_frame": "redheader.jpg"
    },
    "colors": {
      "frame": "#ebe4e4",
      "tab_background_text": "#080000"
    }
  },
  "version": "2.0",
  "name": "King Crimson Red",
  "manifest_version": 2,
  "description": "For all the Crimson fans..."
}