Examine source code of William Morris Mustard

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "William Morris Mustard",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg",
        "images/2.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center",
        "right top",
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(177, 197, 196, 0)",
      "toolbar_text": "rgb(234, 231, 213)",
      "frame": "rgb(195, 216, 206)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(208, 191, 53)",
      "toolbar_field_text": "rgb(41, 75, 58)",
      "tab_line": "rgb(208, 191, 53)",
      "popup": "rgb(234, 231, 213)",
      "popup_text": "rgb(41, 75, 58)",
      "icons": "rgb(176, 121, 71)",
      "tab_selected": "rgb(255, 194, 165)",
      "tab_text": "rgb(41, 75, 58)",
      "tab_loading": "rgb(208, 191, 53)"
    }
  }
}