Examine source code of Soft Colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Soft Colors",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(255, 203, 225)",
      "toolbar_text": "rgb(248, 112, 152)",
      "frame": "rgb(185, 233, 175)",
      "tab_background_text": "rgb(7, 117, 18)",
      "toolbar_field": "rgb(245, 244, 200)",
      "toolbar_field_text": "rgb(255, 111, 0)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(224, 214, 251)",
      "popup_text": "rgb(123, 127, 204)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3103d83b-0302-483a-abdd-5f83226f8ea1}"
    }
  }
}