Examine source code of Blue Lighthouse Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Lighthouse",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(247, 247, 247, 0.64)",
      "toolbar_text": "rgb(20, 21, 21)",
      "frame": "rgb(195, 230, 237)",
      "tab_background_text": "rgb(9, 10, 10)",
      "toolbar_field": "rgba(255, 255, 255, 0.36)",
      "toolbar_field_text": "rgb(7, 7, 7)",
      "tab_line": "rgb(168, 240, 231)",
      "popup": "rgb(188, 219, 232)",
      "popup_text": "rgb(5, 124, 167)",
      "tab_loading": "rgb(168, 240, 231)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d76b54a9-0c77-4b94-8c2d-b42dc95f848d}"
    }
  }
}