Two arrows chasing each other around a circle: reciprocity, which is the whole idea. It has no background, one color, and no filters, so it drops onto any surface and survives the sanitizers that avatar pipelines and mail clients run. The one exception is the favicon, which drops the shadow: at 16 to 32 pixels the offset is sub-pixel and only blurs the strokes.

Please don't recolor it outside this palette, rotate it, add a background plate, or set it in another typeface. If you need a variant we haven't published, ask the stewards — we would rather make one than have several in the wild. All of these files live in the repository and are free to use under our license.

Teal carries the brand and every interactive affordance: links, the page header, and the token chip. Plum is reserved for errors and debits, and the orange only ever marks keyboard focus. Everything else is neutral.

Quicksand sets headings, Josefin Sans sets everything else, and Noto Sans Mono sets code. Both are open licensed and are served from this domain rather than a font CDN.