Examine source code of FTP Red/Black

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "FTP Red/Black",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(46, 46, 46)",
      "toolbar_text": "rgb(131, 131, 131)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(160, 160, 160)",
      "toolbar_field": "rgb(22, 22, 22)",
      "toolbar_field_text": "rgb(142, 142, 142)",
      "tab_line": "rgb(129, 36, 36)",
      "popup": "rgb(46, 46, 46)",
      "popup_text": "rgb(255, 0, 0)",
      "tab_loading": "rgb(129, 36, 36)"
    }
  }
}