Red X Icon - Universal Symbol for Error, Cancel, or Prohibition #189767 (License: Personal Use)

This high-contrast symbol features a thick red X centered on a white square, enclosed by a vibrant red border-designed for maximum visibility and immediate recognition. It adheres to international standards for warning and prohibition signage, commonly employed in user interfaces, safety labels, and error messages. Its simplicity ensures cross-cultural comprehension and accessibility.

Used in web and mobile UIs for close buttons, error alerts, form validation failures, and prohibited action indicators; also appears in traffic signs, safety manuals, and regulatory notices where quick visual communication is critical.