Examine source code of dark_green

{
  "theme": {
    "images": {
      "theme_frame": "dark-Header2.jpg"
    },
    "colors": {
      "frame": "#f7a1a1",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "dark_green",
  "manifest_version": 2,
  "description": "mysterious dark/green"
}