Examine source code of Cool Red Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cool Red Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom",
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(185, 37, 66)",
      "frame": "rgb(72, 0, 0)",
      "tab_background_text": "rgb(255, 216, 224)",
      "toolbar_field": "rgb(131, 74, 74)",
      "toolbar_field_text": "rgb(255, 182, 182)",
      "tab_line": "rgb(33, 0, 7)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 0, 0)",
      "popup_border": "rgb(0, 0, 0)",
      "popup_highlight_text": "rgb(255, 59, 59)",
      "tab_background_separator": "rgb(0, 0, 0)",
      "toolbar_field_separator": "rgb(0, 0, 0)",
      "toolbar_top_separator": "rgb(102, 26, 25)",
      "toolbar_vertical_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(33, 0, 7)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{53924e22-4335-4c22-85c6-8e66a799f797}"
    }
  }
}