Examine source code of Just a Darkside Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Darkside",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(13, 13, 15)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(24, 25, 25)",
      "tab_background_text": "rgb(174, 177, 184)",
      "toolbar_field": "rgb(34, 34, 38)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(248, 5, 5)",
      "popup": "rgb(23, 23, 25)",
      "popup_text": "rgb(215, 226, 239)",
      "ntp_background": "rgb(11, 11, 14)",
      "tab_loading": "rgb(248, 5, 5)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3272afba-5f95-4bf8-810e-48c68c5f50a4}"
    }
  }
}