Examine source code of Chill Grey Light

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cool Blue Light",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(244, 244, 244)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(151, 163, 175)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(166, 178, 189)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.91)",
      "tab_line": "rgb(185, 185, 185)",
      "popup": "rgb(244, 244, 244)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(185, 185, 185)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{da672f5b-cf01-4916-bd5b-416b511df5ff}"
    }
  }
}