Examine source code of Peak Purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Peak Purple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(45, 8, 83, 0.47)",
      "toolbar_text": "rgb(229, 203, 255)",
      "frame": "rgb(45, 8, 83)",
      "tab_background_text": "rgb(177, 150, 205)",
      "toolbar_field": "rgba(45, 8, 83, 0.58)",
      "toolbar_field_text": "rgb(229, 203, 255)",
      "tab_line": "rgba(45, 8, 83, 0.58)",
      "popup": "rgba(45, 8, 83, 0.68)",
      "popup_text": "rgb(229, 203, 255)",
      "tab_selected": "rgba(45, 8, 83, 0.47)",
      "tab_loading": "rgba(45, 8, 83, 0.58)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{17d83b1b-f6ba-40aa-b994-a5f88c0e4261}"
    }
  }
}