Examine source code of Night Box Purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Night Box Purple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(76, 7, 94)",
      "toolbar_text": "rgb(172, 177, 233)",
      "frame": "rgb(5, 10, 13)",
      "tab_background_text": "rgb(247, 199, 196)",
      "toolbar_field": "rgb(234, 238, 240)",
      "toolbar_field_text": "rgb(13, 13, 17)",
      "tab_line": "rgb(112, 206, 158)",
      "popup": "rgb(15, 15, 17)",
      "popup_text": "rgb(228, 228, 241)",
      "tab_loading": "rgb(112, 206, 158)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{838f1db0-54cc-4ff4-8ae2-eb427ad6ba5f}"
    }
  }
}