Examine source code of Fading Pink

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Rose",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(68, 15, 37)",
      "toolbar_text": "rgb(255, 69, 157)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(237, 237, 237)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(237, 237, 237)",
      "tab_line": "rgb(255, 69, 157)",
      "popup": "rgb(27, 6, 15)",
      "popup_text": "rgb(237, 237, 237)",
      "button_background_hover": "rgb(52, 11, 27)",
      "icons_attention": "rgb(255, 69, 157)",
      "ntp_background": "rgb(38, 8, 20)",
      "popup_border": "rgb(255, 69, 157)",
      "popup_highlight": "rgb(174, 46, 106)",
      "tab_text": "rgb(237, 237, 237)",
      "toolbar_bottom_separator": "rgb(38, 8, 20)",
      "toolbar_field_border_focus": "rgb(218, 59, 134)",
      "toolbar_field_highlight": "rgb(174, 46, 106)",
      "toolbar_top_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 69, 157)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9af78725-f266-4cb5-9827-a8cf241cbef4}"
    }
  }
}