Design system do tailwindcss.com

---
version: alpha
name: "tailwindcss.com"
description: "Design system extracted from https://tailwindcss.com/ on 2026-09-28"
colors:
  background: "#ffffff"
  foreground: "#ffffff"
  muted-foreground: "#000000"
  primary: "#000000"
  on-primary: "#ffffff"
typography:
  headline-display:
    fontFamily: "inter"
    fontSize: "96px"
    fontWeight: 400
    lineHeight: "1"
    letterSpacing: "-4.8px"
  headline-lg:
    fontFamily: "inter"
    fontSize: "40px"
    fontWeight: 500
    lineHeight: "1"
    letterSpacing: "-2px"
  headline-md:
    fontFamily: "inter"
    fontSize: "36px"
    fontWeight: 600
    lineHeight: "1.33"
  body-md:
    fontFamily: "inter"
    fontSize: "14px"
    fontWeight: 400
    lineHeight: "2"
  label-md:
    fontFamily: "plexMono"
    fontSize: "12px"
    fontWeight: 400
    lineHeight: "2"
  button:
    fontFamily: "inter"
    fontSize: "14px"
    fontWeight: 400
    lineHeight: "1.71"
  code:
    fontFamily: "inter"
    fontSize: "12px"
    fontWeight: 400
    lineHeight: "1.33"
rounded:
  none: "0px"
  2xl: "32px"
  md: "8px"
  full: "9999px"
  xl: "16px"
spacing:
  unit: "8px"
  1: "8px"
  2: "16px"
  3: "24px"
  4: "32px"
  5: "40px"
  6: "64px"
components:
  button-ghost:
    backgroundColor: "#ffffff"
    textColor: "#000000"
    typography: "{typography.button}"
    rounded: "16px"
    height: "24px"
    padding: "2px 6px"
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.button}"
    rounded: "32px"
    height: "40px"
    padding: "8px 16px"
  input:
    backgroundColor: "transparent"
    rounded: "0px"
    height: "24px"
  card:
    backgroundColor: "transparent"
    rounded: "8px"
    padding: "12px"
---

# tailwindcss.com

## Overview

Tailwind CSS - Rapidly build modern websites without ever leaving your HTML.: Tailwind CSS is a utility-first CSS framework for rapidly building modern websites without ever leaving your HTML.

Soft, well-rounded controls, layered shadows for depth, large display type at 96px / 400, a single neutral accent on neutrals. The site ships in light mode by default. Measured from 2349 rendered elements at 1440px wide on 2026-09-28.

Reference screenshots live beside this file; look at them before writing any layout, they carry the composition, density and image treatment that tokens cannot:

- `screenshots/desktop-1440-fold.png`: Desktop 1440, above the fold
- `screenshots/desktop-1440-full.jpg`: Desktop 1440, full page
- `screenshots/desktop-1440-light.png`: Desktop 1440, light mode
- `screenshots/laptop-1024-fold.png`: Laptop 1024, above the fold
- `screenshots/tablet-768-fold.png`: Tablet 768, above the fold
- `screenshots/phone-390-fold.png`: Phone 390, above the fold
- `screenshots/phone-390-full.jpg`: Phone 390, full page
- `screenshots/phone-390-menu.png`: Phone 390, navigation menu open
- `screenshots/c-button-1--rest.png`: Button 1 ("index.html"), rest
- `screenshots/c-button-1--focus.png`: Button 1 ("index.html"), focus
- `screenshots/c-link-1--rest.png`: Text link 1 ("openai.com"), rest
- `screenshots/c-link-1--focus.png`: Text link 1 ("openai.com"), focus
- `screenshots/c-radio-1--rest.png`: Radio 1, rest
- `screenshots/c-radio-1--focus.png`: Radio 1, focus
- `screenshots/c-radio-1--checked.png`: Radio 1, checked
- `screenshots/c-menu-button-1--rest.png`: Menu / dropdown trigger 1 ("v4.3"), rest
- `screenshots/c-dropdown-menu-1--open.png`: Dropdown menu 1 opened by menu-button "v4.3"
- `screenshots/c-menu-button-1--open.png`: Menu / dropdown trigger 1 ("v4.3"), open (trigger)
- `screenshots/c-footer-link-1--rest.png`: Footer link 1 ("Documentation"), rest
- `screenshots/c-social-links-1--rest.png`: Social icon links 1, rest
- `screenshots/c-theme-toggle-1--rest.png`: Theme toggle 1 ("Check availability"), rest
- `screenshots/c-card-1--rest.png`: Card 1 ("FiltersWhat’s a website "), rest
- `screenshots/c-avatar-1--rest.png`: Avatar 1, rest
- `screenshots/c-code-1--rest.png`: Code block / inline code 1 ("@theme { --font-sans: "I"), rest
- `screenshots/c-kbd-1--rest.png`: Keyboard key 1 ("Ctrl K"), rest
- `screenshots/c-image-1--rest.png`: Image / figure 1, rest
- `screenshots/c-icon-1--rest.png`: Icon 1, rest
- `screenshots/c-heading-eyebrow-1--rest.png`: Eyebrow / kicker 1 ("Sponsors"), rest
- `screenshots/c-button-2--rest.png`: Button 2 ("Get started"), rest
- `screenshots/c-button-2--focus.png`: Button 2 ("Get started"), focus
- `screenshots/c-link-2--rest.png`: Text link 2 ("Docs"), rest
- `screenshots/c-link-2--focus.png`: Text link 2 ("Docs"), focus
- `screenshots/c-radio-2--rest.png`: Radio 2, rest
- `screenshots/c-radio-2--focus.png`: Radio 2, focus
- `screenshots/c-radio-2--checked.png`: Radio 2, checked
- `screenshots/c-card-2--rest.png`: Card 2 ("@theme { --font-sans: "I"), rest
- `screenshots/c-code-2--rest.png`: Code block / inline code 2 ("<!DOCTYPE html><html lan"), rest
- `screenshots/c-icon-2--rest.png`: Icon 2, rest
- `screenshots/c-heading-eyebrow-2--rest.png`: Eyebrow / kicker 2 ("Why Tailwind CSS?"), rest
- `screenshots/c-button-3--rest.png`: Button 3 ("app.css"), rest
- `screenshots/c-button-3--focus.png`: Button 3 ("app.css"), focus
- `screenshots/c-link-3--rest.png`: Text link 3 ("Plus"), rest
- `screenshots/c-link-3--focus.png`: Text link 3 ("Plus"), focus
- `screenshots/c-card-3--rest.png`: Card 3 ("blur-smbrightness-150gra"), rest
- `screenshots/c-icon-3--rest.png`: Icon 3, rest
- `screenshots/c-button-4--rest.png`: Button 4 ("⌘KCtrl K"), rest
- `screenshots/c-button-4--focus.png`: Button 4 ("⌘KCtrl K"), focus
- `screenshots/c-link-4--rest.png`: Text link 4 ("Trademark Policy"), rest
- `screenshots/c-link-4--focus.png`: Text link 4 ("Trademark Policy"), focus
- `screenshots/c-card-4--rest.png`: Card 4 ("index.htmlapp.csspackage"), rest
- `screenshots/c-button-5--rest.png`: Button 5 ("Quick search⌘KCtrl K"), rest
- `screenshots/c-button-5--focus.png`: Button 5 ("Quick search⌘KCtrl K"), focus
- `screenshots/c-card-5--rest.png`: Card 5 ("Browse propertiesTreehou"), rest
- `screenshots/c-card-6--rest.png`: Card 6 ("Class WarfareThe Anti-Pa"), rest

## Colors

| Token | Value | Use |
| --- | --- | --- |
| background | `#ffffff` | Page background |
| foreground | `#ffffff` | Primary text |
| muted-foreground | `#000000` | Secondary text, captions |
| primary | `#000000` | Accent: primary buttons, links, focus |
| on-primary | `#ffffff` | Text on the accent |

Full painted palette by area (largest first): `#ffffff`, `#000000`.

Gradients in use: `radial-gradient(oklab(0.129999 -0.00404751 -0.027702 / 0.05) 1px, rgba(0, 0, 0, 0) 0px)`; `repeating-linear-gradient(315deg, oklab(0 0 0 / 0.05) 0px, oklab(0 0 0 / 0.05) 1px, rgba(0, 0, 0, 0) 0px, rgba(0, 0, 0, 0) 50%)`; `linear-gradient(rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0) 50%, lab(1.90334 0.278696 -5.48866) 100%)`.

The accent `#000000` is used sparingly: primary buttons, links and focus rings. Everything else stays neutral.

## Typography

- **inter** for h1, h2, h3, body, button, code: Google Fonts (inter).
- **plexMono** for label: self-hosted webfont, not freely available; use **Inter** from Google Fonts as the stand-in.

| Role | Family | Size | Weight | Line height | Tracking |
| --- | --- | --- | --- | --- | --- |
| headline-display | inter | 96px | 400 | 1 | -4.8px |
| headline-lg | inter | 40px | 500 | 1 | -2px |
| headline-md | inter | 36px | 600 | 1.33 | normal |
| body-md | inter | 14px | 400 | 2 | normal |
| label-md | plexMono | 12px | 400 | 2 | normal |
| button | inter | 14px | 400 | 1.71 | normal |
| code | inter | 12px | 400 | 1.33 | normal |

Type scale in use: 12px, 13px, 14px, 16px, 18px, 36px, 40px, 96px. Base body size 14px.

The H1 renders at 96px / 400, start aligned, up to 1360px wide, tracking -4.8px. Sample: "Rapidly build modern websites without ever leaving your HTML.".

## Layout

- Spacing unit: 8px. Scale in use: 8, 16, 24, 32, 40, 64 (px).
- Flex and grid gaps: 8, 16, 24, 32, 40, 48 px.
- Content max width: 1360px, centred.
- Breakpoints: 640px, 768px, 1024px, 1280px, 1536px.

## Elevation & Depth

Shadows in use, most common first:

- shadow-1: `oklab(0.129999 -0.00404751 -0.027702 / 0.1) 0px 0px 0px 1px inset`
- shadow-2: `oklab(0.999994 0.0000455678 0.0000200868 / 0.05) 0px 0px 0px 1px inset`
- shadow-3: `oklab(0.999994 0.0000455678 0.0000200868 / 0.1) 0px 0px 0px 1px inset`
- shadow-4: `oklab(0.129999 -0.00404751 -0.027702 / 0.05) 0px 0px 0px 1px`

## Shapes

- Buttons: 32px
- Inputs: 0px
- Cards and panels: 8px
- Images and media: 0px
- Radius scale: none 0px, 2xl 32px, md 8px, full 9999px, xl 16px

## Components

### Button, ghost

Background transparent (it sits on `#ffffff`, so place it on that colour), text `#000000`, border none, radius 16px, height 24px, padding 2px 6px, 12px / 500. Sample label: "v4.3".

### Button, primary

Background `#000000`, text `#ffffff`, border none, radius 32px, height 40px, padding 8px 16px, 14px / 600. Sample label: "Get started".

### Input

Height 24px, background `transparent`, border 0px solid #000000, radius 0px, 16px text, padding 0px 0px.

### Card

Background `transparent`, border none, radius 8px, padding 12px, shadow `rgba(0, 0, 0, 0) 0px 0px 0px 0px, oklab(0.999994 0.0000455678 0.0000200868 / 0.1) 0px 0px 0px 1px inset, 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`. Typical size about 419×504px.

### Link

Colour `#000000`, no underline at rest, weight 400.

### Full inventory

`COMPONENTS.md` carries every component kind found on the page (24 of 87 in the checklist, 44 variants) with each state that was measured live (hover, keyboard focus, pressed, disabled, checked, filled, invalid, open: 12 state changes, 1 overlays opened) and a cropped screenshot of each; `components.css` is the same as a stylesheet. Read it before building any control. Summary:

| Component | Variants | States measured | Sample |
| --- | --- | --- | --- |
| Button | secondary, ink lg, ghost, ghost-with-icon, ghost-with-icon lg | focus | "index.html" |
| Text link | plain, plain, plain, plain | focus | "openai.com" |
| Text input | outlined | rest only |  |
| Radio | custom, custom | focus |  |
| Header / navbar | default | rest only | "v4.3⌘KCtrl KDocsPlayBlogShowca" |
| Menu / dropdown trigger | secondary | open | "v4.3" |
| Footer | default | rest only | "Tailwind CSSDocumentationPlayg" |
| Footer link | plain | rest only | "Documentation" |
| Social icon links | default | rest only |  |
| Theme toggle | default | rest only | "Check availability" |
| Card | filled-with-media, filled-with-media, filled-with-media, elevated, elevated-with-media, filled-with-media | rest only | "FiltersWhat’s a website these " |
| Styled list | default | rest only |  |
| Avatar | 48px-round | rest only |  |
| Code block / inline code | block, block | rest only | "@theme { --font-sans: "Inter"," |
| Keyboard key | default | rest only | "Ctrl K" |
| Image / figure | aspect-1.14-rounded, aspect-0.6, aspect-1 | rest only |  |
| Icon | outline-28px, filled-16px, outline-15px | rest only |  |
| Eyebrow / kicker | default, default | rest only | "Sponsors" |

Not on this page (do not invent them; if the build needs one, derive it from the nearest kind above): Icon button, Toggle / segmented control, Button group, Floating action button, Close / dismiss button, Search field, Textarea, Select (native), Combobox / custom select, Checkbox, Switch / toggle, Range slider, File input / dropzone, Date / time input, Input with attached button or addon, Field label, Help / hint text, Validation error text, Fieldset / form section, Navigation link, Breadcrumb, Tabs, Pagination, Stepper / progress steps, Sidebar navigation, Skip link, Back to top, Language / region switch, Tooltip, Popover, Dialog / modal, Drawer / sheet / off-canvas, Toast / snackbar, Banner / announcement bar, Cookie / consent notice, Lightbox / media viewer, Badge / pill / tag, Chip (removable / selectable tag), Alert / callout, Progress bar, Spinner / loader, Skeleton / shimmer, Counter / notification dot, Empty state, Rating / stars, Pricing card / plan, Feature item (icon + title + text), Testimonial / quote card, Stat / metric, List row / menu row, Table, Table row, Accordion / disclosure, Avatar stack, Divider, Blockquote, Video / media embed, Carousel / slider, Logo strip, FAQ block, Call-to-action band, Newsletter / signup form, Search results / listing row.

## Dark Mode

Both themes exist; the default render is light and the light theme was reached via data-theme=light. Token pairs, light → dark:

| Token | Light | Dark |
| --- | --- | --- |
| background | `#ffffff` | `#ffffff` |
| foreground | `#ffffff` | `#ffffff` |

Light-theme shadows: `oklab(0.999994 0.0000455678 0.0000200868 / 0.1) 0px 0px 0px 1px inset`; `oklab(0.999994 0.0000455678 0.0000200868 / 0.05) 0px 0px 0px 1px inset`; `oklab(0.999994 0.0000455678 0.0000200868 / 0.2) 0px 0px 0px 1px inset, oklab(0.129999 -0.00404751 -0.027702 / 0.1) 0px 0px 0px 1px, rgba(0, 0, 0, 0.1) 0px 1px 3px 0px, rgba(0, 0, 0, 0.1) 0px 1px 2px -1px`; `oklab(0.999994 0.0000455678 0.0000200868 / 0.1) 0px 0px 0px 1px`

## Responsive Behavior

| Viewport | Content width | Gutter | Body | H1 | Header | Hero | Grids | Buttons |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| desktop 1440px | 1360px | 40px | 16px | 96px, 2 lines, start |  | text only | 2→2 col; 4→4 col; 2→2 col | content-width |
| laptop 1024px | 944px | 40px | 16px | 60px, 2 lines, start |  | text only | 2→2 col; 3→3 col; 2→1 col | content-width |
| tablet 768px | 720px | 24px | 16px | 48px, 2 lines, start |  | text only | 2→2 col; 2→1 col; 2→2 col | content-width |
| phone 390px | 358px | 0px | 16px | 36px, 3 lines, start |  | text only | 2→2 col; 2→1 col; 3→1 col | 1 full-width |

- H1 goes 96px → 36px (38%), 2 → 3 lines.
- Card grids: 4 columns → 2 columns on phones (gap 40px → 20px).
- Body text stays 16px at every width.
- Phone side gutter 0px.
- 1 buttons stretch full-width on phones.

## Interaction & Motion

258 elements carry transitions; typical 0.15s with cubic-bezier(0.4, 0, 0.2, 1), mostly on opacity, color, background-color. 1 running keyframe animations (ping 1s infinite).

- Hover on button-primary ("Get started"): no visible change; cursor pointer.
- Focus on button-primary: outline 1px auto rgb(16, 16, 16), offset 1px.
- No tooltip could be triggered from the first viewport, but the stylesheet defines tooltip rules (.group-data-\[tooltip-hover\=true\]\:opacity-100:is(:where(.group)[data-tooltip-hover="true"] *)): opacity: 1.
- 1 aria-haspopup triggers exist; none opened on hover (click-to-open menus).
- No scroll-reveal: content is visible without scrolling into view.
- Overlay library detected: headlessui.

Full detail (every overlay, table, form, scroll and text rule measured) is in `BEHAVIOR.md`; raw evidence in `evidence.json`.

## Do's and Don'ts

- Do use 8px multiples for every padding, margin and gap; the site does not use odd values.
- Do reserve `#000000` for actions and focus; never paint large areas with it.
- Do keep body text at 14px in inter.
- Do match corner radii per element class (buttons 32px, cards 8px); do not pick one radius for everything.
- Do use the measured shadows above; do not invent heavier ones.
- Don't substitute a different accent hue or introduce gradients that are not listed above.
- Don't rebuild from the tokens alone; open the screenshots for composition, density and image treatment.
- Note: The primary action colour is the ink colour (monochrome palette); chromatic colours appear only as small accents.
- Note: Body text contrast is 1.0:1 against the page background (below 4.5:1).