Examine source code of Flatted Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Flatted Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(17, 17, 17)",
      "toolbar_text": "rgb(130, 130, 130)",
      "frame": "rgb(17, 17, 17)",
      "tab_background_text": "rgb(140, 140, 140)",
      "toolbar_field": "rgb(17, 17, 17)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(64, 64, 64)",
      "popup": "rgb(17, 17, 17)",
      "popup_text": "rgb(149, 149, 149)",
      "button_background_active": "rgb(30, 30, 30)",
      "button_background_hover": "rgb(33, 33, 33)",
      "frame_inactive": "rgb(17, 17, 17)",
      "icons_attention": "rgb(255, 255, 255)",
      "icons": "rgb(112, 112, 112)",
      "ntp_background": "rgb(17, 17, 17)",
      "ntp_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(189, 189, 189)",
      "sidebar_highlight": "rgb(205, 197, 244)",
      "sidebar_text": "rgb(240, 167, 41)",
      "sidebar": "rgb(17, 17, 17)",
      "tab_background_separator": "rgb(17, 17, 17)",
      "tab_loading": "rgb(255, 178, 43)",
      "tab_selected": "rgb(32, 32, 32)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(17, 17, 17)",
      "toolbar_field_border_focus": "rgb(17, 17, 17)",
      "toolbar_field_focus": "rgb(17, 17, 17)",
      "toolbar_field_highlight": "rgb(74, 74, 74)",
      "toolbar_field_separator": "rgb(17, 17, 17)",
      "toolbar_top_separator": "rgb(17, 17, 17)",
      "toolbar_vertical_separator": "rgb(130, 130, 130)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{41856941-822b-424a-af30-344a00847d4f}"
    }
  }
}