An icon from the OOjs UI lib. Colors modified: Black exclamation mark, dark-red triangle.
.mw-parser-output .plainlist ul{line-height:inherit;list-style:none none;margin:0}.mw-parser-output .plainlist ul li{margin-bottom:0}
OOjs UI icon alert.svg
OOjs UI icon alert destructive.svg
derivative work. Original authors: See https://phabricator.wikimedia.org/diffusion/GOJU/browse/master/AUTHORS.txt and the "source" files mentioned above. Colors modified by Tobias ToBeFree Frei, changes released as "public domain" / probably ineligible for copyright.