Biohazard Trefoil Circle color outline icon

About the Biohazard Trefoil Circle color outline 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 outline version of the biohazard trefoil circle icon: the same line drawing in an accent colour, useful for highlighting a state, a category or a brand tone without adding visual weight.

Get it free as an SVG vector or transparent PNG (16-512px), copy the SVG code, or restyle it in the free online editor — recolor any part, add gold, neon or gradient effects, animate it, or export EPS, PDF and DXF.

Free for personal and commercial use with attribution.