Examine source code of Blue Accent

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue Accent",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(68, 84, 105)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(42, 52, 65)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(42, 52, 65)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(68, 84, 105)",
      "popup": "rgb(39, 49, 61)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(50, 62, 76)",
      "tab_loading": "rgb(68, 84, 105)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{36b99c03-ac1e-4a06-8f50-d6a3c9f7c359}"
    }
  }
}