Examine source code of Dark Raspberry

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "vvvv",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-017-7074520d97b5c592d413aed5f115f093.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(55, 31, 41)",
      "toolbar_text": "rgb(208, 143, 144)",
      "frame": "rgb(48, 15, 29)",
      "tab_background_text": "rgb(120, 87, 86)",
      "toolbar_field": "rgb(23, 6, 9)",
      "toolbar_field_text": "rgb(207, 137, 138)",
      "tab_line": "rgb(140, 89, 87)",
      "popup": "rgb(48, 24, 34)",
      "popup_text": "rgb(199, 141, 138)",
      "icons": "rgb(172, 133, 130)",
      "tab_loading": "rgb(140, 89, 87)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{639c0d01-0945-4a06-a47c-c1a307d65d9e}"
    }
  }
}