Examine source code of Pink summer sunset

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Sunset Pink",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(45, 43, 43, 0.35)",
      "toolbar_text": "rgb(249, 166, 251)",
      "frame": "rgb(249, 166, 251)",
      "tab_background_text": "rgb(249, 166, 251)",
      "toolbar_field": "rgba(62, 47, 62, 0.35)",
      "toolbar_field_text": "rgb(249, 166, 251)",
      "tab_line": "rgb(249, 166, 251)",
      "popup": "rgba(45, 43, 43, 0.7)",
      "popup_text": "rgb(249, 166, 251)",
      "popup_border": "rgb(249, 166, 251)",
      "toolbar_field_border_focus": "rgba(249, 166, 251, 0.5)",
      "toolbar_field_border": "rgba(249, 166, 251, 0.6)",
      "toolbar_field_highlight_text": "rgb(249, 166, 251)",
      "toolbar_field_highlight": "rgba(249, 166, 251, 0.15)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)",
      "tab_loading": "rgb(249, 166, 251)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1b87bb0f-39a6-45de-9d0c-a07aa540f91f}"
    }
  }
}