Examine source code of red theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "red",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(61, 31, 31)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(50, 13, 14)",
      "tab_background_text": "rgb(239, 215, 215)",
      "toolbar_field": "rgb(89, 54, 54)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(215, 17, 17)",
      "popup": "rgb(61, 31, 31)",
      "popup_text": "rgb(239, 215, 215)",
      "icons": "rgb(255, 201, 201)",
      "ntp_background": "rgb(33, 19, 19)",
      "ntp_text": "rgb(219, 199, 199)",
      "tab_loading": "rgb(255, 201, 201)",
      "tab_text": "rgb(219, 199, 199)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{af0f6396-6d59-4927-ae8c-079875c99a22}"
    }
  }
}