Examine source code of Winter Vibes (Dark)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Winter Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-029-cc9cab928c1799136d18758709e91ecc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.2)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(4, 63, 99)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(4, 63, 99)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(255, 255, 255, 0)",
      "popup": "rgb(79, 121, 139)",
      "popup_text": "rgb(255, 255, 255)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(3, 33, 56)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgba(255, 255, 255, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgba(255, 255, 255, 0)",
      "sidebar_border": "rgba(255, 255, 255, 0)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(79, 121, 139)",
      "tab_background_separator": "rgba(255, 255, 255, 0)",
      "tab_loading": "rgb(255, 255, 255)",
      "tab_selected": "rgba(255, 255, 255, 0)",
      "toolbar_bottom_separator": "rgb(79, 121, 139)",
      "toolbar_field_border": "rgba(255, 255, 255, 0)",
      "toolbar_field_focus": "rgb(79, 121, 139)",
      "toolbar_field_separator": "rgba(255, 255, 255, 0)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e2d2eaa4-4327-4014-a118-b33ae55b3740}"
    }
  }
}