Examine source code of Pastel Gradient Autumn

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Pastel Gradient Autumn",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(93, 132, 104)",
      "toolbar_text": "rgb(242, 199, 154)",
      "frame": "rgb(27, 22, 28)",
      "tab_background_text": "rgb(146, 82, 96)",
      "toolbar_field": "rgb(0, 24, 48)",
      "toolbar_field_text": "rgb(216, 144, 72)",
      "tab_line": "rgb(148, 208, 164)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(242, 199, 154)",
      "tab_background_separator": "rgb(0, 24, 48)",
      "tab_loading": "rgb(148, 208, 164)"
    }
  }
}