• Leave clear space of at least half the mark's height on every side.
• Prefer the SVG. The PNG is there for raster-only cases.
• No recoloring, rotating, stretching, or outlining. A system pilcrow won't do either, since the shapes differ.
• The name is RFC123: one word, no space, set in Lastik Regular.

Writing about RFC123 or linking to it is fair use of the mark. Implying that we built or endorsed your product is not.