Examine source code of Nostromo

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nostromo",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(77, 94, 112)",
      "toolbar_text": "rgb(217, 205, 138)",
      "frame": "rgb(61, 74, 50)",
      "tab_background_text": "rgb(254, 113, 123)",
      "toolbar_field": "rgba(2, 17, 16, 0.4)",
      "toolbar_field_text": "rgb(0, 148, 232)",
      "tab_line": "rgb(0, 144, 255)",
      "popup": "rgb(71, 71, 71)",
      "popup_text": "rgb(105, 207, 32)",
      "tab_loading": "rgb(0, 144, 255)"
    }
  }
}