Examine source code of Transparent Theme - Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Transparent Theme - Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(11, 11, 11, 0.36)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(55, 55, 55)",
      "tab_background_text": "rgb(195, 195, 195)",
      "toolbar_field": "rgba(7, 7, 7, 0.3)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(77, 77, 77)",
      "popup": "rgba(18, 18, 18, 0.77)",
      "popup_text": "rgb(212, 212, 212)",
      "button_background_active": "rgb(32, 32, 32)",
      "button_background_hover": "rgb(22, 22, 22)",
      "ntp_background": "rgb(11, 11, 11)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(30, 30, 30)",
      "popup_highlight_text": "rgb(21, 21, 21)",
      "popup_highlight": "rgb(21, 21, 21)",
      "sidebar_border": "rgb(232, 232, 232)",
      "sidebar_highlight": "rgb(25, 25, 25)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(14, 14, 14)",
      "tab_selected": "rgb(49, 49, 49)",
      "toolbar_field_border": "rgb(71, 71, 71)",
      "toolbar_field_focus": "rgba(7, 7, 7, 0.5)",
      "toolbar_field_highlight": "rgba(134, 134, 134, 0.5)",
      "tab_loading": "rgb(77, 77, 77)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2582b214-aaf6-43ce-87a9-0a71447520b7}"
    }
  }
}