Examine source code of Slate Theme Gray

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Slate Theme Gray",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(207, 207, 207)",
      "toolbar_text": "rgb(40, 40, 40)",
      "frame": "rgb(40, 40, 40)",
      "tab_background_text": "rgb(202, 202, 202)",
      "toolbar_field": "rgb(235, 235, 235)",
      "toolbar_field_text": "rgb(32, 33, 36)",
      "tab_line": "rgba(55, 55, 55, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(32, 33, 36)",
      "frame_inactive": "rgb(60, 60, 60)",
      "ntp_text": "rgb(60, 60, 60)",
      "tab_background_separator": "rgb(55, 55, 55)",
      "toolbar_bottom_separator": "rgb(182, 182, 184)",
      "toolbar_top_separator": "rgba(244, 23, 23, 0)",
      "tab_loading": "rgba(55, 55, 55, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8808140b-a1c4-4df7-b244-efee1683cdad}"
    }
  }
}