Examine source code of Yaru dark Ubuntu theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Yaru dark Ubuntu theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(61, 61, 61)",
      "toolbar_text": "rgb(247, 247, 247)",
      "frame": "rgb(44, 44, 44)",
      "tab_background_text": "rgb(247, 247, 247)",
      "toolbar_field": "rgb(44, 44, 44)",
      "toolbar_field_text": "rgb(247, 247, 247)",
      "tab_line": "rgb(223, 74, 22)",
      "popup": "rgb(64, 64, 64)",
      "popup_text": "rgb(247, 247, 247)",
      "button_background_active": "rgba(119, 63, 114, 0.7)",
      "button_background_hover": "rgba(119, 63, 114, 0.4)",
      "frame_inactive": "rgb(62, 62, 62)",
      "ntp_background": "rgb(44, 44, 44)",
      "tab_loading": "rgb(119, 63, 114)"
    }
  }
}