Examine source code of rain Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "rain Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-009-f069b97f439938a011297c84464f0df6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(134, 135, 118)",
      "toolbar_text": "rgb(17, 17, 19)",
      "frame": "rgb(23, 23, 23)",
      "tab_background_text": "rgb(173, 173, 173)",
      "toolbar_field": "rgb(68, 68, 68)",
      "toolbar_field_text": "rgb(221, 221, 221)",
      "tab_line": "rgb(17, 17, 19)",
      "popup": "rgb(134, 135, 118)",
      "popup_text": "rgb(17, 17, 19)",
      "tab_loading": "rgb(17, 17, 19)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{83ae6519-b21e-468b-bc8f-41da3e983a8b}"
    }
  }
}