Examine source code of TOR colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "tor",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(83, 34, 108)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(29, 29, 29)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(29, 29, 29)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(83, 34, 108)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(83, 34, 108)",
      "tab_loading": "rgb(4, 255, 0)",
      "toolbar_field_border_focus": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d463029-b17f-4c55-9eaa-b3efd66dddb0}"
    }
  }
}