Examine source code of Dark & Fancy

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark & Fancy",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-003-31b6bea3c78e3a19fd889b0389652a94.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(49, 49, 49)",
      "toolbar_text": "rgb(224, 190, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(71, 71, 71)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 33, 79)",
      "popup": "rgb(55, 55, 55)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 33, 79)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aa6e2705-b821-4e49-baed-67f8f748a54c}"
    }
  }
}