Examine source code of Cute Night Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cute Night Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(105, 90, 161, 0)",
      "toolbar_text": "rgba(249, 221, 105, 0.8)",
      "frame": "rgb(89, 56, 156)",
      "tab_background_text": "rgb(243, 167, 221)",
      "toolbar_field": "rgba(90, 54, 157, 0)",
      "toolbar_field_text": "rgb(243, 167, 221)",
      "tab_line": "rgba(249, 221, 105, 0.79)",
      "popup": "rgb(89, 56, 156)",
      "popup_text": "rgba(249, 221, 105, 0.79)",
      "toolbar_bottom_separator": "rgba(249, 221, 105, 0)",
      "toolbar_field_border": "rgba(249, 221, 105, 0.15)",
      "toolbar_field_focus": "rgba(243, 167, 221, 0.25)",
      "toolbar_field_text_focus": "rgba(249, 221, 105, 0)",
      "toolbar_top_separator": "rgba(249, 221, 105, 0)",
      "toolbar_vertical_separator": "rgba(249, 221, 105, 0)",
      "tab_loading": "rgba(249, 221, 105, 0.79)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{24797621-2d59-4fb7-aa90-2234da703ee6}"
    }
  }
}