Examine source code of Grey Boats

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Grey Boats",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(125, 140, 149)",
      "toolbar_text": "rgb(23, 60, 49)",
      "frame": "rgb(0, 51, 85)",
      "tab_background_text": "rgb(68, 91, 83)",
      "toolbar_field": "rgb(233, 236, 237)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(74, 3, 17)",
      "popup": "rgb(94, 97, 112)",
      "popup_text": "rgb(32, 32, 34)",
      "ntp_background": "rgb(94, 97, 108)",
      "toolbar_field_border": "rgb(141, 140, 155)",
      "toolbar_field_separator": "rgb(141, 140, 155)",
      "toolbar_top_separator": "rgb(141, 140, 155)",
      "tab_loading": "rgb(74, 3, 17)"
    }
  }
}