Northline
- 8
- colours
- 2
- fonts
- 3
- assets
- 12
- rules
Aa
Outfit
Aa
Inter
Aa
IBM Plex Mono
#0F172A
#1E40AF
#38BDF8
#F8FAFC
#D9F99D
#FFFFFF
Living brand style guides for people and AI.
One place to edit, one URL to share, structured outputs for all the people and tools that need it.
Free to use
AI & People friendly
Fast setup
One shareable URL
Assets included
Everything your brand needs
One slab to rule your entire visual identity — built for humans and AI alike.
Colour palettes
Primary, secondary, and accent swatches with HEX, RGB, and HSL values exported in every format.
Typography rules
Font families, weights, sizes, and line heights — all in one place with live preview.
Spacing tokens
Define your 4px grid and spacing system. Output as CSS variables, JSON, or plain text.
Logo library
Upload all logo variations with clear-space rules, minimum sizes, and misuse examples.
AI-friendly
Structured output that AI tools understand natively. Paste your slab link to brief any model.
Dev-friendly
CSS variables and Tailwind definitions are available when teams need production-ready tokens.
From scattered brand bits to a working slab.
Turn brand material into something teams, tools and AI agents can actually reference.
01
Start a slab
Name the brand, add a source URL, or begin from a blank style guide.
02
Collect the system
Pull in colours, type, spacing, logo files, usage notes, and assets.
03
Tidy the rules
Edit specimens, label tokens, remove noise, and keep only what people should use.
04
Share the URL
Publish a visual page, JSON endpoint, and asset downloads from one place.
Visual + JSON + assets
Every published slab ships a visual page, JSON and CSS for tools, a PNG summary, and a downloads page for approved assets.
Custom fonts, handled
Upload TTF, OTF, WOFF, or WOFF2 and we render real specimens. License-restricted fonts can display as outlines while the file stays private.
Free to build
Drafts are free and private. Publish your first slab and its exports free, then upgrade for imports, protected sharing, teams, or more live slabs.