---
version: alpha
name: Cult UI
description: "Light monochrome interface measured from cult-ui.com: GeistSans type with GeistPixelSquare, tonal surfaces and 8px corners."
colors:
  background: "#FAFAFA"
  surface: "#FAFAFA"
  on-surface: "#666666"
  on-background: "#666666"
  on-surface-strong: "#171717"
  on-surface-variant: "#A1A1A1"
  surface-container-low: "#FFFFFF"
  surface-container: "#FFFFFFF2"
  surface-container-high: "#F5F5F5"
  overlay: "#FFFFFF26"
  overlay-strong: "#F5F5F58C"
  outline: "#EBEBEBCC"
  outline-variant: "#0000001A"
  primary: "#171717"
  on-primary: "#FFFFFF"
  secondary: "#E17100"
  success: "#00C98D"
typography:
  headline-display:
    fontFamily: GeistSans
    fontSize: 64px
    fontWeight: 450
    lineHeight: 1.11
    letterSpacing: -0.06em
  headline-lg:
    fontFamily: GeistSans
    fontSize: 48px
    fontWeight: 450
    lineHeight: 1
    letterSpacing: -0.06em
  body-md:
    fontFamily: GeistSans
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
  body-lg:
    fontFamily: GeistSans
    fontSize: 18px
    fontWeight: 400
    lineHeight: 1.56
    letterSpacing: -0.025em
  body-sm:
    fontFamily: GeistPixelSquare
    fontSize: 10px
    fontWeight: 400
    lineHeight: 1.5
  label-md:
    fontFamily: GeistSans
    fontSize: 16px
    fontWeight: 500
    lineHeight: 1.5
  label-sm:
    fontFamily: GeistSans
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.43
  code:
    fontFamily: GeistMono
    fontSize: 10px
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: 0.05em
  headline-display-mobile:
    fontFamily: GeistSans
    fontSize: 36px
    fontWeight: 450
    lineHeight: 1.11
    letterSpacing: -0.06em
  headline-lg-mobile:
    fontFamily: GeistSans
    fontSize: 24px
    fontWeight: 450
    lineHeight: 1.33
    letterSpacing: -0.06em
rounded:
  sm: 8px
  md: 16px
  lg: 24px
spacing:
  xs: 4px
  sm: 8px
  md: 16px
  lg: 24px
  xl: 64px
  gutter: 8px
  section: 96px
  container: 1152px
components:
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.label-md}"
    padding: 0px 22px 0px 24px
    height: 48px
  button-outline:
    backgroundColor: "{colors.surface-container-low}"
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.label-md}"
    padding: 0px 24px
    height: 48px
  button-ghost:
    typography: "{typography.label-md}"
    padding: 0px 24px
  card:
    typography: "{typography.body-md}"
    rounded: 32px
    padding: 0px
  link:
    textColor: "{colors.on-surface}"
---

# Cult UI Design System

## Overview

Cult UI describes itself as: “Open-source Shadcn UI components, animated blocks, and full templates you can copy-paste into any TypeScript/Next.js project.” The interface is light, built on **Snow (#FAFAFA)** with **Slate (#666666)** text and almost no color: actions are carried by contrast, not hue.

Type is set in **GeistSans** and **GeistPixelSquare**, with **GeistMono** for code. Headlines run large with tight negative tracking; body text is 16px. Depth comes from soft drop shadows. Corners are mostly 8px.

Measured from [cult-ui.com](https://www.cult-ui.com/) on October 26, 2026 at 1440×900 and 390×844 from 369 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 15 roles.

- **Snow (#FAFAFA):** Page background. Token `background`.
- **Slate (#666666):** Primary text and headings, seen 84 times. Token `on-surface`.
- **Charcoal (#171717):** Headings and emphasis, seen 28 times. Token `on-surface-strong`.
- **Gray (#A1A1A1):** Secondary text, seen 6 times. Token `on-surface-variant`.
- **White (#FFFFFF):** Raised areas one step from the page, seen 47 times. Token `surface-container-low`.
- **White 95% (#FFFFFFF2):** Cards and panels, seen 5 times. Token `surface-container`.
- **Snow (#F5F5F5):** Hover and pressed fills, seen 3 times. Token `surface-container-high`.
- **White 15% (#FFFFFF26):** Translucent fill for cards and controls, seen 1 time. Token `overlay`.
- **Snow 55% (#F5F5F58C):** Stronger translucent fill, seen 1 time. Token `overlay-strong`.
- **Mist 80% (#EBEBEBCC):** Borders and dividers, seen 18 times. Token `outline`.
- **Near Black 10% (#0000001A):** Secondary dividers, seen 2 times. Token `outline-variant`.
- **Charcoal (#171717):** Primary buttons and calls to action, seen 37 times. Token `primary`.
- **White (#FFFFFF):** Text and icons on primary. Token `on-primary`.
- **Vivid Orange (#E17100):** Most used accent color, seen 14 times. Token `secondary`.
- **Teal (#00C98D):** Success and positive states, seen 9 times. Token `success`.

## Typography

**GeistSans**, **GeistPixelSquare** and **GeistMono** (monospace) share the interface. Fallback stack: `GeistSans, GeistSans Fallback`.

- **headline-display:** GeistSans 64px at weight 450, line height 1.11, tracking -0.06em (36px on mobile). Page title (h1).
- **headline-lg:** GeistSans 48px at weight 450, line height 1, tracking -0.06em (24px on mobile). Section headings (h2).
- **body-md:** GeistSans 16px at weight 400, line height 1.5. Body text.
- **body-lg:** GeistSans 18px at weight 400, line height 1.56, tracking -0.025em. Lead paragraphs.
- **body-sm:** GeistPixelSquare 10px at weight 400, line height 1.5. Secondary and small text.
- **label-md:** GeistSans 16px at weight 500, line height 1.5. Buttons, navigation and labels.
- **label-sm:** GeistSans 14px at weight 400, line height 1.43. Small labels and badges.
- **code:** GeistMono 10px at weight 400, line height 1.5, tracking 0.05em. Code and technical values.

## Layout

Spacing is mostly on a 4px grid (74% of measured values), with some off-grid steps. Match the measured scale rather than rounding everything.

- **Scale:** xs 4px, sm 8px, md 16px, lg 24px, xl 64px.
- **Sections:** 96px vertical padding between major sections.
- **Gaps:** 8px is the most common gap in flex and grid layouts.
- **Container:** content is capped at 1152px.
- **Breakpoints:** 600px, 640px.

## Elevation & Depth

Raised elements use soft drop shadows. The most used recipes:

- `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.06) 0px 0px 0px 1px, rgba(0, 0, 0, 0.06) 0px 1px 2px -1px, rgba(0, 0, 0, 0.04) 0px 2px 4px 0px`
- `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 0px 0px 1px, rgba(0, 0, 0, 0.04) 0px 1px 2px 0px`
- `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 1px 0px, rgba(255, 252, 240, 0.5) 0px 1px 1px 0px inset, rgba(255, 255, 255, 0.1) 0px 0px 0px 1px inset, rgba(28, 27, 26, 0.5) 0px 0px 1px 0px`

## Shapes

Most elements use 8px corners. Measured radii, most used first:

- **sm (8px):** 181 elements.
- **lg (24px):** 108 elements.
- **md (16px):** 72 elements.

## Components

Measured from the rendered page. Token values reference the tokens above.

- **button-primary (“Browse 154 components”):** #171717 fill, #FFFFFF text, 16px/500, 3.35544e+07px radius, padding 0px 22px 0px 24px.
- **button-outline (“Show 28 more components”):** #FFFFFF fill, #171717 text, 16px/500, 3.35544e+07px radius, padding 0px 24px, shadow `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.06) 0px 0px 0px 1px, rgba(0, 0, 0, 0.06) 0px 1px 2px -1px, rgba(0, 0, 0, 0.04) 0px 2px 4px 0px`.
- **button-ghost (“Show 28 more components”):** transparent fill, 16px/500, 3.35544e+07px radius, padding 0px 24px, shadow `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.06) 0px 0px 0px 1px, rgba(0, 0, 0, 0.06) 0px 1px 2px -1px, rgba(0, 0, 0, 0.04) 0px 2px 4px 0px`.
- **card:** transparent fill, 16px/400, 32px radius, padding 0px, shadow `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.06) 0px 0px 0px 1px, rgba(0, 0, 0, 0.06) 0px 1px 2px -1px, rgba(0, 0, 0, 0.04) 0px 2px 4px 0px`.
- **link:** transparent fill, #666666 text, padding 0px.

## Do's and Don'ts

- Do use #FAFAFA for the page and lift surfaces in small steps: #FFFFFF, #FFFFFFF2, #F5F5F5.
- Do keep text in 3 levels: #666666, #171717, #A1A1A1.
- Do let contrast carry emphasis; primary actions use #171717 on #FAFAFA.
- Do set headlines in GeistSans with tight tracking (-0.06em).
- Do reuse the measured spacing steps (8px, 16px, 24px).
- Do use 8px corners on most elements; larger surfaces also use 24px and 16px.
- Don't use #A1A1A1 for body text; it reaches 2.5:1 on #FAFAFA. Keep it for large text or metadata.
- Don't introduce new font families beyond GeistSans, GeistPixelSquare and GeistMono.
- Don't add saturated accent colors; the measured palette is almost entirely neutral.
- Don't make interface transitions slower than 0.3s.

## Motion

Interface transitions are quick: 0.15s, 0.3s.

- **Easing:** `cubic-bezier(0.4, 0, 0.2, 1)`, `ease`, `cubic-bezier(0, 0, 0.2, 1)`.
- **Reduced motion:** the page responds to `prefers-reduced-motion`.

Generated by [Sitepeel](https://sitepeel.dev/design-md/cult-ui.com/), the free DESIGN.md generator.