Examine source code of zwartst

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "zwartst",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-014-1586da559b26f11cd37804ee9347a16b.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(188, 188, 188)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(225, 225, 225)",
      "toolbar_field": "rgba(126, 126, 126, 0)",
      "toolbar_field_text": "rgb(241, 241, 241)",
      "tab_line": "rgb(130, 130, 130)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(241, 241, 241)",
      "tab_loading": "rgb(130, 130, 130)"
    }
  }
}