Examine source code of Detroit Nights

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Detroit Nights",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(27, 40, 45, 0.65)",
      "toolbar_text": "rgb(255, 188, 144)",
      "frame": "rgb(30, 23, 36)",
      "tab_background_text": "rgb(140, 140, 140)",
      "toolbar_field": "rgba(28, 18, 22, 0.54)",
      "toolbar_field_text": "rgb(255, 223, 196)",
      "tab_line": "rgb(30, 23, 36)",
      "popup": "rgb(27, 40, 45)",
      "popup_text": "rgb(255, 188, 144)",
      "button_background_hover": "rgb(64, 64, 64)",
      "sidebar_text": "rgb(255, 223, 196)",
      "sidebar": "rgb(27, 40, 45)",
      "tab_loading": "rgb(189, 89, 128)"
    }
  }
}