Examine source code of duck-dark-pro

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "duck-dark-pro",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgb(54, 58, 89)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(200, 64, 30)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "icons": "rgb(239, 0, 57)",
      "ntp_background": "rgb(30, 27, 43)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(225, 27, 82)",
      "popup_highlight_text": "rgb(184, 50, 87)",
      "sidebar_border": "rgb(95, 70, 76)",
      "sidebar_highlight_text": "rgb(133, 60, 80)",
      "sidebar_highlight": "rgb(251, 13, 70)",
      "sidebar_text": "rgb(227, 219, 223)",
      "sidebar": "rgb(27, 29, 27)",
      "tab_selected": "rgb(20, 1, 9)",
      "toolbar_bottom_separator": "rgb(213, 8, 111)",
      "toolbar_field_highlight_text": "rgb(255, 0, 128)",
      "toolbar_field_separator": "rgb(193, 26, 43)",
      "toolbar_top_separator": "rgb(63, 27, 221)",
      "tab_loading": "rgb(200, 64, 30)"
    }
  }
}