Examine source code of Gray-dark mode 1.0

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Simple Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(114, 114, 114)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(73, 73, 73)",
      "tab_background_text": "rgb(255, 208, 251)",
      "toolbar_field": "rgb(255, 252, 250)",
      "toolbar_field_text": "rgb(179, 128, 245)",
      "tab_line": "rgb(0, 85, 255)",
      "popup": "rgb(114, 114, 114)",
      "popup_text": "rgb(224, 248, 255)",
      "icons": "rgb(195, 233, 255)",
      "ntp_text": "rgba(255, 223, 182, 0.15)",
      "popup_border": "rgb(114, 114, 114)",
      "sidebar_border": "rgb(231, 231, 231)",
      "tab_loading": "rgb(239, 255, 60)",
      "toolbar_bottom_separator": "rgba(114, 114, 114, 0)",
      "toolbar_field_border": "rgba(114, 114, 114, 0)",
      "toolbar_field_separator": "rgba(114, 114, 114, 0)",
      "toolbar_top_separator": "rgba(114, 114, 114, 0)",
      "toolbar_vertical_separator": "rgba(114, 114, 114, 0)"
    }
  }
}