Examine source code of Viva Magenta

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Viva Magenta",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(187, 38, 73)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(148, 30, 58)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(148, 30, 58)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(187, 38, 73)",
      "popup": "rgb(106, 22, 41)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(187, 38, 73)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{67b20d36-cf92-4d6b-a7f7-66fc1d705041}"
    }
  }
}