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Brand Guidelines

How to use
the brand.

For press, partners, and integration authors. The brand reads as brutalist editorial — cream surface, ink rules, yellow accents, hard corners. Hold the line and it stays recognizable; bend it and it stops being us.

Logo.

PromptRails — primary lockup
PromptRails — inverted on ink

Do · Don't

Do
  • ✓Use on cream / white. Keep 0.5× logo-height padding around it.
  • ✓Pair with the wordmark when first introducing the brand.
  • ✓Render at 28px+ for the wordmark to stay legible.
  • ✓Inverted (white on ink) on the dark CTA section.
Don't
  • ✕Place on busy photographs or low-contrast brand colors.
  • ✕Use the mark alone in headers without an obvious return path home.
  • ✕Squash, stretch, rotate, recolor, or add gradients.
  • ✕Apply drop shadows, glows, or 3D effects.

Need source files (SVG / PNG)? Reach out at [email protected].

Palette.

#F4F1EA
Cream

Surface — primary background

#FBF9F3
Paper

Card / panel — secondary surface

#0D0D0C
Ink

Text & borders — 2px rules everywhere

#FFE14A
Yellow

Accent — CTAs, highlights, hover

#6B675C
Dim

Muted text, italic accents

#E23A1F
Red

Destructive / warning — sparingly

Typography.

Display
Fraunces

H1, H2, big quotes. Italic for accents. Variable optical-size axis tuned to 144.

Ship the agent.
Body
Space Grotesk

Paragraphs, body copy, buttons, lede.

PromptRails is the control plane for AI agents.
Mono
JetBrains Mono

Eyebrows, status labels, code, tags. Always uppercase with 0.06–0.22em tracking when used as an eyebrow.

01 / SOLUTIONS · AI ENGINEERS

Voice & tone.

Direct, technical, slightly editorial. Sentences are short. Numbers earn their place. Marketing-speak gets the boot.

Do
  • ✓Specific. Verbs. Numbers.
  • ✓"Ship a traced agent in 5 minutes."
  • ✓Concrete benefits ("p99 < 18ms gateway overhead").
  • ✓Confess tradeoffs ("we charge for runs, not seats").
  • ✓Reference the open-source story (langrails) when relevant.
Don't
  • ✕Marketing fluff. Synergy. Empower.
  • ✕"Accelerate your AI transformation journey."
  • ✕Vague claims ("blazing fast performance").
  • ✕Pretend we replaced ten tools with no caveats.
  • ✕Hide the OSS underneath. It’s the moat.

Boilerplate.

Copy this as the standard one-liner for press, partner pages, and conference bios.

PromptRails is the control plane for production AI agents — prompts, orchestration, tracing, guardrails, and cost across 14 LLM providers. One contract. No lock-in. Built on an open-source Go ecosystem (langrails, memoryrails, mediarails, guardrails).

Press kit.

For high-resolution logos, screenshots, founder photos, or any other asset for press, partner pages, or conference materials, contact [email protected].