Radioactive black outline icon

About the Radioactive black outline icon

The international trefoil: three tapered blades set at even intervals around a small central circle, each separated by a clear gap. It marks radiation sources, nuclear material and restricted zones. Use it on hazard labels and signage, laboratory and medical imaging interfaces, energy sector reports, safety training slides, and game or sci-fi interface art.

Blades fan out at 120 degree intervals with an open ring left around the core, so the shape stays recognizable when reduced. Pair it with biohazard, flammable and high voltage warning icons; set it inside a triangle or circle when a formal warning sign is required.

This is the black outline version of the radioactive icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.

Download it free as a scalable SVG vector or transparent-background PNG in seven sizes (16 to 512px), copy the SVG code straight into your project, or open it in the free online editor to change colors, apply gold, silver, neon and gradient styles, animate it, or convert it to EPS, PDF and DXF.

Free for personal and commercial use with attribution.