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Design guide

Fintech app design

Trust through restraint. The accent is reserved for money in motion; calm reads as careful.

Typography
Typeface ·
Restrained neo-grotesque, low contrast (Inter, IBM Plex Sans, Söhne)
Hero ·
36–48px
Body ·
15–16px
Numerals ·
Tabular lining — mandatory; pick a font with disambiguated 0/O & 1/l
Corner personality

Soft (8–12px) — approachable but composed

Pick one and apply it to every card, button, input, and modal. Mixing sharp and round corners is the #1 tell of un-designed UI.

Color

Maximum restraint — accent only for CTAs, positive trend, active balance. Green/red for up/down, never decoration.

Density

Medium-low. One number dominates each card. Whitespace signals care.

Typography

Numbers first — hero balance 48px with 24px unit (2:1). Currency and dates recede.

Motion

Spring (confident Toss bounce on CTAs) or Silk for balances. Never bouncy on real money changing.

Patterns

Balance hero, transaction list with status dot, KPI with trend, period toggle, spend donut.

Avoid in fintech & banking

  • rainbow palettes
  • gradients on amounts
  • fake precision ($8,400.0000)
  • floating shadows
  • motion that delays seeing a balance

Build it with StyleSeed

StyleSeed bakes this judgment into 74 rules your AI reads automatically. For fintech & banking, start from the Toss / Stripe skin and the spring motion seed.

Make your AI design fintech & banking right
Open source design engine for Claude Code, Codex & Cursor. MIT.
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