Examine source code of Witcher3

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Witcher3",
  "theme": {
    "images": {
      "additional_backgrounds": []
    },
    "properties": {
      "additional_backgrounds_alignment": [],
      "additional_backgrounds_tiling": []
    },
    "colors": {
      "toolbar": "rgb(17, 23, 33)",
      "toolbar_text": "rgb(143, 143, 143)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(143, 143, 143)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(147, 13, 13)",
      "popup": "rgb(27, 40, 45)",
      "popup_text": "rgb(140, 140, 140)",
      "button_background_hover": "rgba(119, 1, 1, 0.45)",
      "icons_attention": "rgb(147, 13, 13)",
      "ntp_background": "rgb(0, 3, 7)",
      "ntp_text": "rgb(245, 242, 242)",
      "tab_background_separator": "rgba(255, 0, 4, 0.45)",
      "tab_loading": "rgb(147, 13, 13)"
    }
  }
}