Examine source code of Linear Night

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Blue Stripes",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-013-06591d4ad28ab7b9ee90f62f81d6b505.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(29, 55, 75)",
      "toolbar_text": "rgb(230, 251, 255)",
      "frame": "rgb(30, 55, 75)",
      "tab_background_text": "rgb(141, 237, 255)",
      "toolbar_field": "rgb(31, 67, 97)",
      "toolbar_field_text": "rgb(151, 239, 255)",
      "tab_line": "rgb(211, 243, 249)",
      "popup": "rgb(15, 56, 87)",
      "popup_text": "rgb(175, 243, 255)",
      "icons_attention": "rgb(171, 225, 255)",
      "icons": "rgb(168, 220, 251)",
      "ntp_background": "rgb(172, 225, 255)",
      "tab_loading": "rgb(211, 243, 249)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6bbef6c5-4031-4e73-922b-d3ce0a7c27d9}"
    }
  }
}