Examine source code of black 11

{
  "theme": {
    "images": {
      "theme_frame": "black11copy.jpg"
    },
    "colors": {
      "frame": "#d6d3d3",
      "tab_background_text": "#e8e1e1"
    }
  },
  "version": "2.0",
  "name": "black 11",
  "manifest_version": 2
}