The identity of Perimeter.
A cool night-slate surface, watched over by a single amber beacon. Built to feel like an instrument for people who run their own infrastructure — precise, calm, and honest about what it can see.
Logo
A reticle of four corner brackets — the boundary you defend — with one amber node lit where the beacon has caught something crossing the edge.
Keep clearspace of at least the mark's height on all sides, and let the beacon dot stay amber.
Recolour the beacon, stretch the wordmark, or set it in any face other than Space Grotesk.
Wordmark
Space Grotesk, weight 600, tracking −0.01em. The mark leads; the wordmark may be dropped at ≤24px where only the mark reads.
Colour
Two scales carry the brand: a cool ink slate for surfaces and text, and an amber beacon for the single point of attention. Every text pairing below is verified to WCAG AA.
Ink — neutral / night slate
Amber — beacon / primary
Semantic status — the four alert registers
New subdomainstaging.acme.dev · info
Domain verifiedacme.dev · ok
Certificate expiringexpires in 6 days · warn
Lookalike registeredacme-support.com · criticalType
Space Grotesk gives the brand its engineered voice; General Sans is the neutral reading surface; JetBrains Mono is the instrument readout for every hostname, serial and DNS record.
Perimeter Aa
Watching the edge
Passive, public, precise
staging. subdomain quietly gets a certificate and becomes discoverable. A cert lapses at 3am. Someone registers a lookalike to phish your customers. Perimeter tells you the hour it happens — nothing more, nothing you have to babysit.Icons
One stroke language across the set — 1.75px, rounded, drawn on the same grid as the mark. Each maps to a real signal or delivery channel in the product.
radar
subdomain
certificate
clock
dns
drift
lookalike
shield-check
bell
globe
mail
webhookVoice
How Perimeter talks: like a competent peer who runs their own box, not a vendor selling fear.
- Plain-spoken
- Vigilant
- Unshowy
Say exactly what changed and what to do about it: “A new certificate for staging.acme.dev appeared 20 minutes ago. If that isn't yours, here's how to check.”
Manufacture panic, pad with security theatre, or imply we scan or attack anything — every signal is public data.
Who we're talking to
A technical solo founder or a 2–5 person dev shop running their product on a single Caddy + systemd VPS — sharp enough to worry about exposure, without a security team or an enterprise budget to do anything about it.
Components
The primitives every later screen is built from, rendered from the tokens above.
Buttons & input
Signal chips
Social card
The 1200×630 share image — composed entirely in SVG and rasterised locally from the self-hosted fonts.
