Examine source code of Solid - Dark and Stormy

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark and stormy",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(25, 25, 25)",
      "toolbar_text": "rgb(223, 223, 223)",
      "frame": "rgb(23, 23, 23)",
      "tab_background_text": "rgb(123, 123, 123)",
      "toolbar_field": "rgb(15, 15, 15)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(55, 55, 55)",
      "popup": "rgb(15, 15, 15)",
      "popup_text": "rgb(200, 200, 200)",
      "button_background_active": "rgb(159, 159, 159)",
      "button_background_hover": "rgb(130, 130, 130)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons_attention": "rgb(176, 176, 176)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(29, 29, 29)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_highlight_text": "rgb(29, 29, 29)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(55, 55, 55)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9a021e1e-eaaa-4a08-8c33-a26d719f9cf7}"
    }
  }
}