Examine source code of Midnight Ocean

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Midnight Ocean",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(149, 175, 255)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(165, 181, 215)",
      "toolbar_field": "rgb(54, 58, 89)",
      "toolbar_field_text": "rgb(158, 184, 255)",
      "tab_line": "rgb(11, 106, 230)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "ntp_background": "rgb(8, 11, 33)",
      "ntp_text": "rgb(149, 175, 255)",
      "toolbar_field_highlight": "rgb(11, 106, 230)",
      "tab_loading": "rgb(11, 106, 230)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f77d349-0144-40a0-b372-1ac7dd214aa9}"
    }
  }
}