Examine source code of Dark Grey

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Grey",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(58, 60, 66)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(32, 34, 37)",
      "tab_background_text": "rgb(238, 235, 235)",
      "toolbar_field": "rgb(41, 43, 47)",
      "toolbar_field_text": "rgb(245, 245, 245)",
      "tab_line": "rgb(91, 94, 104)",
      "popup": "rgb(41, 43, 47)",
      "popup_text": "rgb(255, 255, 255)",
      "frame_inactive": "rgb(32, 34, 37)",
      "ntp_background": "rgb(58, 60, 66)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(40, 39, 39)",
      "popup_highlight": "rgb(71, 73, 79)",
      "sidebar_border": "rgb(31, 31, 31)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(41, 43, 47)",
      "tab_loading": "rgb(0, 221, 255)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(31, 31, 31)",
      "toolbar_field_border_focus": "rgb(41, 43, 47)",
      "toolbar_field_border": "rgb(41, 43, 47)",
      "toolbar_field_focus": "rgb(32, 33, 36)",
      "toolbar_field_highlight": "rgb(83, 102, 133)",
      "toolbar_field_separator": "rgb(41, 43, 47)",
      "toolbar_top_separator": "rgb(41, 43, 47)",
      "toolbar_vertical_separator": "rgb(41, 43, 47)"
    }
  }
}