Examine source code of nexxt design dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "nexxt design dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-023-f741aad3989b46322a7840a425068429.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(54, 70, 79)",
      "toolbar_text": "rgb(224, 233, 239)",
      "frame": "rgb(42, 52, 61)",
      "tab_background_text": "rgb(226, 226, 241)",
      "toolbar_field": "rgb(239, 239, 255)",
      "toolbar_field_text": "rgb(4, 14, 20)",
      "tab_line": "rgb(23, 101, 190)",
      "popup": "rgb(61, 61, 71)",
      "popup_text": "rgb(241, 241, 254)",
      "button_background_hover": "rgb(26, 104, 160)",
      "frame_inactive": "rgb(226, 226, 239)",
      "icons_attention": "rgb(83, 75, 120)",
      "ntp_background": "rgb(38, 38, 46)",
      "ntp_text": "rgb(210, 210, 245)",
      "popup_border": "rgb(32, 87, 143)",
      "popup_highlight_text": "rgb(174, 215, 254)",
      "popup_highlight": "rgb(83, 75, 120)",
      "sidebar_border": "rgb(28, 53, 77)",
      "sidebar_highlight_text": "rgb(33, 35, 54)",
      "sidebar_highlight": "rgb(27, 101, 173)",
      "sidebar_text": "rgb(42, 158, 75)",
      "sidebar": "rgb(43, 54, 65)",
      "tab_background_separator": "rgb(100, 136, 110)",
      "tab_loading": "rgb(70, 102, 135)",
      "tab_selected": "rgb(79, 89, 96)",
      "tab_text": "rgb(229, 228, 255)",
      "toolbar_field_border_focus": "rgb(94, 109, 99)",
      "toolbar_field_border": "rgb(148, 1, 91)",
      "toolbar_field_focus": "rgb(7, 21, 35)",
      "toolbar_field_highlight": "rgb(92, 78, 162)",
      "toolbar_field_separator": "rgb(32, 42, 114)",
      "toolbar_field_text_focus": "rgb(242, 240, 253)",
      "toolbar_top_separator": "rgb(66, 81, 54)",
      "toolbar_vertical_separator": "rgb(21, 43, 62)"
    }
  }
}