Function Health — design system & UI screens

Consumer · 1 screen · 12 sections · https://www.functionhealth.com/

Full-bleed forest-and-hand nature photo hero with a light serif wordmark and an HSA/FSA-eligible badge, closing on 160+ lab tests / Whole body / $1-per-day metric callouts and a Start testing button.

Open in Mozaika →

This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/website/function-health.

Decoded design system

Function Health's decoded design system: background #FEF9EF, text #2A2B2F, accent #B05A36, link #B05A36, primary #FEF9EF; type scale h1 80px / h2 64px / body 14px; 4px spacing base; 12px base radius. The single interactive/action color is #B05A36 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#FEF9EF`
surface	`#F1ECE3`
border	`#DEDAD2`
text	`#2A2B2F`
text_muted	`#7A7977`
primary	`#FEF9EF`
accent	`#B05A36`
link	`#B05A36`
secondary	`#F5EEE1`
button_bg	`#B05A36`
button_text	`#FEF9EF`

Using these colors

Action color #B05A36 — the single interactive color; only on things you click or must notice, never large fills.
accent, link, button_bg are all #B05A36 — one role, not several (the action color).
accent #B05A36 — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
primary #FEF9EF — a neutral UI color (chips, tags, icon fills, chrome), not the action color (action = #B05A36).
secondary #F5EEE1 — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.

Typography

Heading: Financier Display
Body: Arial
Mono: Fragment mono
h1: 80px
h2: 64px
body: 14px

Spacing

base unit: 4px
scale: 2px, 4px, 6px, 8px, 12px, 16px, 24px, 32px

Radii

base: 12px
button: 40px

Full design system, per-section tokens & DESIGN.md / Tailwind / CSS exports →