Examine source code of Humble Gray (Dark)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Humble Gray (Dark)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(78, 78, 78)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(51, 51, 51)",
      "tab_background_text": "rgb(243, 243, 243)",
      "toolbar_field": "rgb(78, 78, 78)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(62, 62, 62)",
      "popup": "rgb(62, 62, 62)",
      "popup_text": "rgb(243, 243, 243)",
      "button_background_active": "rgb(34, 34, 34)",
      "button_background_hover": "rgb(34, 34, 34)",
      "icons": "rgb(243, 243, 243)",
      "ntp_background": "rgb(51, 51, 51)",
      "ntp_text": "rgb(243, 243, 243)",
      "sidebar_border": "rgb(34, 34, 34)",
      "sidebar_highlight_text": "rgb(243, 243, 243)",
      "sidebar_highlight": "rgb(94, 94, 94)",
      "sidebar_text": "rgb(243, 243, 243)",
      "sidebar": "rgb(51, 51, 51)",
      "tab_background_separator": "rgb(51, 51, 51)",
      "toolbar_bottom_separator": "rgb(34, 34, 34)",
      "tab_loading": "rgb(62, 62, 62)"
    }
  }
}