Examine source code of Watercolour Deer

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Watercolour Deer",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(244, 215, 223, 0)",
      "toolbar_text": "rgb(194, 211, 235)",
      "frame": "rgb(51, 113, 122)",
      "tab_background_text": "rgb(244, 215, 223)",
      "toolbar_field": "rgba(64, 40, 0, 0)",
      "toolbar_field_text": "rgb(194, 211, 235)",
      "tab_line": "rgba(105, 116, 151, 0.53)",
      "popup": "rgba(105, 116, 151, 0.53)",
      "popup_text": "rgb(244, 215, 223)",
      "tab_loading": "rgba(105, 116, 151, 0.53)"
    }
  }
}