Biohazard Trefoil Circle color filled icon

About the Biohazard Trefoil Circle color filled icon

The standard biohazard trefoil is drawn as three interlocking broken rings around a small central circle, all set inside a thin outer ring. It signals biological risk: infectious material, contaminated waste, restricted lab zones and quarantine areas. Fits laboratory and hospital interfaces, waste disposal labeling, safety training decks, biosecurity documentation and public health or outbreak dashboards.

The three lobes sit at even 120 degree spacing with open gaps where the arcs cross, which keeps the shape recognizable without filling in. Pairs naturally with radiation, toxic and general warning icons. Because the arcs are thin and close, use it at 24 px or larger so the gaps do not close up.

This is the colour filled version of the biohazard trefoil circle icon: a flat, solid-colour shape that stands out in dashboards, marketing pages and app tiles where the icon needs to carry colour meaning.

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.