mistral.ai is built on a warm, off-white canvas (rgb(251, 251, 248)).
The system uses rgb(9, 9, 11) as a near-neutral accent (low saturation).
Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside ALTMistral as the primary typeface.
A restrained elevation system (1 distinct shadow) — shadows reserved for the few elements that must lift off the page.
Motion is a first-class concern — 21 keyframe animations plus transition-driven interactions.
01
Color — roles, semantics & the full census
17 colors measured · click any swatch to copy
Canvas
#fbfbf8
AAA 18.21:1
Ink
#111111
AAA 18.21:1
Accent
#09090b
AAA 19.19:1
Line
#e4e3de
Fail 1.24:1
Semantic states
No semantic state colors detected — this system signals state through weight & motion, not hue.
17 colors mined from the live renderexpand
02
Type — the ladder, in the real face
5 roles · rendered live in the real Inter (captured woff2) · lines are editable, click any spec to copy
display xl
display-xl16px · 400
display md
display-md16px · 400 · ×1.00
body
body11px · 400 · ×1.45
caption
caption14px · 500 · ×0.79
eyebrow
eyebrow11px · 400 · ×1.27
04
Depth — elevation is extracted, not invented
1 box-shadows measured on the live page · click a tile to copy its raw value
shadow-1
05
Motion — easings, transitions & live keyframes
3 easing curves · 21 keyframes · hover a tile to preview
Maintain nav height at 48px — consistent vertical space for the navigation bar
Respect the 8px–80px spacing range — the design uses a wide scale for visual breathing room
Each card uses an icon (not photo) — the visual language is illustrative, not photographic
Don't
Don't use pure white (`#ffffff`) as a page background — the warm tone is part of the brand identity
Don't substitute with generic sans-serif or serif — the custom font carries the brand
Don't invent new shadow values — use only the extracted shadow levels
Don't introduce additional saturated accent colors — the palette is intentionally controlled
Don't collapse or hide the nav on scroll without an explicit scroll-triggered animation — the design uses fixed nav presence
Don't make the nav sticky — this design lets it scroll away to maximize content focus
Don't put a CTA button in the nav — this design uses links only at the top
Don't over-build the footer — this design keeps it minimal (1 cols, 1 links)
10
Agent guide & export
Paste-ready prompt + the real files behind this page
Build a UI in the mistral.ai design system.
Canvas #fbfbf8 · ink #111111 · accent #09090b.
Type: Inter — respect the size/weight ladder in §3.
Radius, spacing, shadow: use only the extracted scales (no magic numbers).
Full spec follows — paste the DESIGN.md below into your agent.