Examine source code of Dark Blue Gray

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Blue Gray",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(106, 108, 169)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(82, 83, 153)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(88, 92, 158)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(106, 108, 169)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6d041cc-2411-4f7d-9e02-220cc623ad34}"
    }
  }
}