Examine source code of Wandering Purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-039-717a66ba4d455686088c80f391cb3264.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(19, 21, 39)",
      "tab_background_text": "rgb(238, 224, 253)",
      "toolbar_field": "rgba(227, 189, 246, 0.2)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(205, 166, 231)",
      "popup": "rgb(28, 32, 64)",
      "popup_text": "rgb(243, 236, 250)",
      "tab_loading": "rgb(205, 166, 231)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{17234f03-7c5e-4d21-b165-d3ecf2e37bfe}"
    }
  }
}