Examine source code of Cowboy

{
  "theme": {
    "images": {
      "theme_frame": "Cowboybanner.JPG"
    },
    "colors": {
      "frame": "#deda04",
      "tab_background_text": "#4d4004"
    }
  },
  "version": "2.0",
  "name": "Cowboy",
  "manifest_version": 2,
  "description": "Spike form Cowboy Bebop."
}