Examine source code of bulbasaur evolution theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "bulbasaur evolution theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(120, 186, 142)",
      "toolbar_text": "rgb(247, 153, 116)",
      "frame": "rgb(171, 209, 150)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(166, 198, 142)",
      "toolbar_field_text": "rgb(1, 96, 43)",
      "tab_line": "rgb(228, 88, 27)",
      "popup": "rgb(53, 152, 129)",
      "popup_text": "rgb(192, 128, 156)",
      "tab_loading": "rgb(228, 88, 27)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3946fc7-c795-4f5c-b562-7d04e3052750}"
    }
  }
}