Examine source code of Pillar Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pillar Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(72, 72, 106)",
      "toolbar_text": "rgb(188, 193, 240)",
      "frame": "rgb(56, 58, 81)",
      "tab_background_text": "rgb(173, 177, 242)",
      "toolbar_field": "rgb(101, 101, 130)",
      "toolbar_field_text": "rgb(213, 215, 255)",
      "tab_line": "rgb(164, 168, 247)",
      "popup": "rgb(64, 65, 85)",
      "popup_text": "rgb(212, 212, 248)",
      "tab_loading": "rgb(164, 168, 247)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8b793f17-3410-433a-b476-4978dbb70c1c}"
    }
  }
}