Examine source code of DDarkTTheme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "DDarkTTheme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(48, 52, 67)",
      "toolbar_text": "rgb(237, 237, 237)",
      "frame": "rgb(12, 12, 23)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(24, 26, 33)",
      "toolbar_field_text": "rgb(240, 242, 255)",
      "tab_line": "rgb(48, 52, 67)",
      "popup": "rgb(23, 23, 31)",
      "popup_text": "rgb(240, 242, 255)",
      "button_background_active": "rgb(69, 65, 89)",
      "icons": "rgb(255, 255, 255)",
      "popup_border": "rgb(23, 23, 31)",
      "toolbar_field_border_focus": "rgba(161, 48, 36, 0.77)",
      "toolbar_field_highlight": "rgb(24, 90, 188)",
      "tab_loading": "rgb(48, 52, 67)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d4e144d8-33ad-4c61-91e5-3661be4ba056}"
    }
  }
}