Examine source code of orange sundown

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#f57a08",
      "tab_background_text": "#050000"
    }
  },
  "version": "2.0",
  "name": "orange sundown",
  "manifest_version": 2,
  "description": "Just a beautiful Hudson River sunset"
}