Examine source code of Neutral Purple

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Neutral Purple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(105, 74, 98)",
      "toolbar_text": "rgb(248, 213, 241)",
      "frame": "rgb(150, 122, 144)",
      "tab_background_text": "rgb(66, 47, 61)",
      "toolbar_field": "rgb(105, 74, 98)",
      "toolbar_field_text": "rgb(252, 229, 248)",
      "tab_line": "rgb(248, 213, 241)",
      "popup": "rgb(105, 74, 98)",
      "popup_text": "rgb(252, 229, 248)",
      "button_background_hover": "rgb(130, 90, 121)",
      "icons": "rgb(248, 213, 241)",
      "ntp_background": "rgb(66, 47, 61)",
      "ntp_text": "rgb(248, 213, 241)",
      "popup_border": "rgb(175, 151, 181)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(252, 229, 248)",
      "tab_selected": "rgb(105, 74, 98)",
      "tab_text": "rgb(252, 229, 248)",
      "toolbar_bottom_separator": "rgb(130, 90, 121)",
      "toolbar_field_border_focus": "rgb(175, 151, 181)",
      "toolbar_field_border": "rgb(175, 151, 181)",
      "toolbar_field_focus": "rgb(105, 74, 98)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(165, 113, 153)",
      "toolbar_field_text_focus": "rgb(249, 236, 247)",
      "toolbar_top_separator": "rgb(130, 90, 121)",
      "tab_loading": "rgb(248, 213, 241)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5f1ef9cc-efd0-4c65-b488-df7c74fe2097}"
    }
  }
}