Once UI· Design Systemonce-ui.com

Dark-first · Next.js · Vercel-adjacent

Build your vision. Once.

Once UI ships tokens, not decisions. Every component exposes its palette, spacing, and radius through variables — build a theme once, the entire kit adapts.

Color Palette21 tokens

background#0a0a0a

surface#141414

surface-elevated#1a1a1a

ink#ffffff

ink-inverted#0a0a0a

text-secondary#d2d2d2

text-muted#959595

text-disabled#595959

primary#08a97c

primary-hover#01cb90

on-primary#ffffff

brand-border-strong#56ecad

brand-border-medium#84f6c3

brand-background-medium#b4fdda

brand-alpha-weak#1a3329

brand-alpha-strong#085541

brand-glow#1a3329

border#292929

danger#ff5f53

danger-inset#852f2a

success#0a8637

Buttons

TypographyGoogle Font

Geist

display-hero

Once. Done right.

80px · 300 · -4px

display-large

Precision over polish

48px · 300 · -1.44px

Once UI ships tokens, not decisions. Every component exposes its palette, spacing, and radius through variables — build a theme once, the entire kit adapts.

40px · 600 · -0.8px

--brand-background-medium: #b4fdda

32px · 600 · 0px

Once UI ships tokens, not decisions. Every component exposes its palette, spacing, and radius through variables — build a theme once, the entire kit adapts.

24px · 500 · 0px

IconsSolar

Set: Solar · brand-matched

Formfocus ring

you@company.com

Password

••••••••

Card · Shapes

Precision over polish

Once UI ships tokens, not decisions. Every component exposes its palette, spacing, and radius through variables — build…

Design System

none

Elevation

RING

CARD

ELEVATED

Controls

Off

✓Checked

Unchecked

Selected

Option

Alerts

Heads up — a new version of the design system is available.

Saved. Your changes are live across all surfaces.

Some tokens are missing a contrast-safe pairing.

Couldn’t reach the server. Retry in a moment.

Badges

SolidSoftOutlineNewv2.0

FAQ

Precision over polish

Once UI ships tokens, not decisions. Every component exposes its palette, spacing, and radius through variables — build a theme once, the entire kit adapts.

How does it integrate with my stack?

Is there a free tier?

Tabs

OverviewActivitySettings

DayWeekMonth

Stats

48.2k

Active users

+12.4%

$12.8k

MRR

+3.1%

99.9%

Uptime

−0.02%

Table

Member	Plan	Status
AQAvery Quinn	Pro	Active
JLJordan Lee	Team	Pending
SRSam Rivera	Free	Active

Avatars

AQJLSR+5

Avery Quinn

Online · Owner

Slider · Progress

Volume62%

Storage used78%

Tooltip · Popover

Brand-styled tooltipHover target

Navigation bar

Banner

Pricing

Pro

$24 /mo

Unlimited projects
Priority support
Custom domains

Stepper

CartDetails3Payment4Review

Breadcrumb

HomeDesign SystemOnce UI

Toast

Changes savedUndo

You have 3 new updates

Activity

Avery created a new project

2h ago

Jordan left a comment

5h ago

Sam shipped v2.0

1d ago

Notifications

AQAvery Quinn invited you to Once UI.

2 minutes ago

JLJordan Lee approved your design tokens.

1 hour ago

SRSam Rivera mentioned you in a thread.

Yesterday

Code

theme.ts

// Once UI tokens
export const theme = {
  primary: "#08a97c",
  radius: "8px",
}

Calendar

March 2026

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Pagination

‹123…12›

Brand moment

The best design system is the one that gets out of the way.

Once UI · Design System

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