Examine source code of Light&dark-blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Clueless",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(249, 249, 250)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(32, 35, 64)",
      "tab_background_text": "rgb(249, 249, 250)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(49, 49, 49)",
      "tab_line": "rgba(248, 112, 140, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgba(248, 112, 140, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1a506b6-1135-4f2d-ab82-929541cdec3b}"
    }
  }
}