Examine source code of Pale Nightfox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pale Nightfox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(29, 30, 64)",
      "toolbar_text": "rgba(255, 255, 255, 0.94)",
      "frame": "rgb(10, 10, 31)",
      "tab_background_text": "rgb(209, 205, 216)",
      "toolbar_field": "rgba(68, 64, 102, 0.61)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(104, 95, 177, 0.91)",
      "popup": "rgb(22, 25, 46)",
      "popup_text": "rgb(234, 231, 250)",
      "tab_selected": "rgb(29, 30, 64)",
      "toolbar_field_border_focus": "rgb(119, 52, 218)",
      "toolbar_top_separator": "rgb(31, 34, 61)",
      "tab_loading": "rgba(104, 95, 177, 0.91)"
    }
  }
}