# Service branding

`spiral-v2` is derived from `https://data.0ff.space/spiral.png` and is
used for the Forgejo and Phanpy icons. The source image is mirrored on
both axes and its RGB channels are inverted while preserving alpha:

```sh
magick spiral.png -flip -flop -channel RGB -negate +channel spiral-v2.png
```

The PNG and ICO sizes are generated from that transformed image. The SVG
is traced from its alpha channel with a white fill.