Examine source code of Dark Notepad by Grishiv

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Notepad by Grishiv",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(7, 50, 84)",
      "toolbar_text": "rgb(251, 242, 242)",
      "frame": "rgb(59, 3, 78)",
      "tab_background_text": "rgb(24, 156, 180)",
      "toolbar_field": "rgb(154, 57, 52)",
      "toolbar_field_text": "rgb(176, 245, 57)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgba(102, 151, 187, 0.99)",
      "popup_text": "rgb(7, 77, 77)",
      "icons_attention": "rgb(16, 8, 56)",
      "icons": "rgb(55, 19, 233)",
      "sidebar_highlight": "rgba(240, 26, 92, 0.1)",
      "sidebar": "rgb(241, 10, 81)",
      "tab_loading": "rgb(0, 0, 0)",
      "tab_selected": "rgb(135, 187, 233)",
      "toolbar_field_highlight_text": "rgb(14, 41, 65)"
    }
  }
}