Examine source code of Blackpattern

{
  "theme": {
    "images": {
      "theme_frame": "headerblack.jpg"
    },
    "colors": {
      "frame": "#a1a1a1",
      "tab_background_text": "#4f4f4f"
    }
  },
  "version": "2.0",
  "name": "Blackpattern",
  "manifest_version": 2,
  "description": "black pattern"
}