ui-design-system
UI Design System
Generate design tokens, create color palettes, calculate typography scales, build component systems, and prepare developer handoff documentation.
Table of Contents
Trigger Terms
Use this skill when you need to:
- "generate design tokens"
- "create color palette"
- "build typography scale"
- "calculate spacing system"
- "create design system"
- "generate CSS variables"
- "export SCSS tokens"
- "set up component architecture"
- "document component library"
- "calculate responsive breakpoints"
- "prepare developer handoff"
- "convert brand color to palette"
- "check WCAG contrast"
- "build 8pt grid system"
Workflows
Workflow 1: Generate Design Tokens
Situation: You have a brand color and need a complete design token system.
Steps:
-
Identify brand color and style
- Brand primary color (hex format)
- Style preference:
modern|classic|playful
-
Generate tokens using script
python scripts/design_token_generator.py "#0066CC" modern json -
Review generated categories
- Colors: primary, secondary, neutral, semantic, surface
- Typography: fontFamily, fontSize, fontWeight, lineHeight
- Spacing: 8pt grid-based scale (0-64)
- Borders: radius, width
- Shadows: none through 2xl
- Animation: duration, easing
- Breakpoints: xs through 2xl
-
Export in target format
# CSS custom properties python scripts/design_token_generator.py "#0066CC" modern css > design-tokens.css # SCSS variables python scripts/design_token_generator.py "#0066CC" modern scss > _design-tokens.scss # JSON for Figma/tooling python scripts/design_token_generator.py "#0066CC" modern json > design-tokens.json -
Validate accessibility
- Check color contrast meets WCAG AA (4.5:1 normal, 3:1 large text)
- Verify semantic colors have contrast colors defined
Workflow 2: Create Component System
Situation: You need to structure a component library using design tokens.
Steps:
-
Define component hierarchy
- Atoms: Button, Input, Icon, Label, Badge
- Molecules: FormField, SearchBar, Card, ListItem
- Organisms: Header, Footer, DataTable, Modal
- Templates: DashboardLayout, AuthLayout
-
Map tokens to components
Component Tokens Used Button colors, sizing, borders, shadows, typography Input colors, sizing, borders, spacing Card colors, borders, shadows, spacing Modal colors, shadows, spacing, z-index, animation -
Define variant patterns
Size variants:
sm: height 32px, paddingX 12px, fontSize 14px md: height 40px, paddingX 16px, fontSize 16px lg: height 48px, paddingX 20px, fontSize 18pxColor variants:
primary: background primary-500, text white secondary: background neutral-100, text neutral-900 ghost: background transparent, text neutral-700 -
Document component API
- Props interface with types
- Variant options
- State handling (hover, active, focus, disabled)
- Accessibility requirements
-
Reference: See
references/component-architecture.md
Workflow 3: Responsive Design
Situation: You need breakpoints, fluid typography, or responsive spacing.
Steps:
-
Define breakpoints
Name Width Target xs 0 Small phones sm 480px Large phones md 640px Tablets lg 768px Small laptops xl 1024px Desktops 2xl 1280px Large screens -
Calculate fluid typography
Formula:
clamp(min, preferred, max)/* 16px to 24px between 320px and 1200px viewport */ font-size: clamp(1rem, 0.5rem + 2vw, 1.5rem);Pre-calculated scales:
--fluid-h1: clamp(2rem, 1rem + 3.6vw, 4rem); --fluid-h2: clamp(1.75rem, 1rem + 2.3vw, 3rem); --fluid-h3: clamp(1.5rem, 1rem + 1.4vw, 2.25rem); --fluid-body: clamp(1rem, 0.95rem + 0.2vw, 1.125rem); -
Set up responsive spacing
Token Mobile Tablet Desktop --space-md 12px 16px 16px --space-lg 16px 24px 32px --space-xl 24px 32px 48px --space-section 48px 80px 120px -
Reference: See
references/responsive-calculations.md
Workflow 4: Developer Handoff
Situation: You need to hand off design tokens to development team.
Steps:
-
Export tokens in required formats
# For CSS projects python scripts/design_token_generator.py "#0066CC" modern css # For SCSS projects python scripts/design_token_generator.py "#0066CC" modern scss # For JavaScript/TypeScript python scripts/design_token_generator.py "#0066CC" modern json -
Prepare framework integration
React + CSS Variables:
import './design-tokens.css'; <button className="btn btn-primary">Click</button>Tailwind Config:
const tokens = require('./design-tokens.json'); module.exports = { theme: { colors: tokens.colors, fontFamily: tokens.typography.fontFamily } };styled-components:
import tokens from './design-tokens.json'; const Button = styled.button` background: ${tokens.colors.primary['500']}; padding: ${tokens.spacing['2']} ${tokens.spacing['4']}; `; -
Sync with Figma
- Install Tokens Studio plugin
- Import design-tokens.json
- Tokens sync automatically with Figma styles
-
Handoff checklist
- Token files added to project
- Build pipeline configured
- Theme/CSS variables imported
- Component library aligned
- Documentation generated
-
Reference: See
references/developer-handoff.md
Tool Reference
design_token_generator.py
Generates complete design token system from brand color.
| Argument | Values | Default | Description |
|---|---|---|---|
| brand_color | Hex color | #0066CC | Primary brand color |
| style | modern, classic, playful | modern | Design style preset |
| format | json, css, scss, summary | json | Output format |
Examples:
# Generate JSON tokens (default)
python scripts/design_token_generator.py "#0066CC"
# Classic style with CSS output
python scripts/design_token_generator.py "#8B4513" classic css
# Playful style summary view
python scripts/design_token_generator.py "#FF6B6B" playful summary
Output Categories:
| Category | Description | Key Values |
|---|---|---|
| colors | Color palettes | primary, secondary, neutral, semantic, surface |
| typography | Font system | fontFamily, fontSize, fontWeight, lineHeight |
| spacing | 8pt grid | 0-64 scale, semantic (xs-3xl) |
| sizing | Component sizes | container, button, input, icon |
| borders | Border values | radius (per style), width |
| shadows | Shadow styles | none through 2xl, inner |
| animation | Motion tokens | duration, easing, keyframes |
| breakpoints | Responsive | xs, sm, md, lg, xl, 2xl |
| z-index | Layer system | base through notification |
Quick Reference Tables
Color Scale Generation
| Step | Brightness | Saturation | Use Case |
|---|---|---|---|
| 50 | 95% fixed | 30% | Subtle backgrounds |
| 100 | 95% fixed | 38% | Light backgrounds |
| 200 | 95% fixed | 46% | Hover states |
| 300 | 95% fixed | 54% | Borders |
| 400 | 95% fixed | 62% | Disabled states |
| 500 | Original | 70% | Base/default color |
| 600 | Original × 0.8 | 78% | Hover (dark) |
| 700 | Original × 0.6 | 86% | Active states |
| 800 | Original × 0.4 | 94% | Text |
| 900 | Original × 0.2 | 100% | Headings |
Typography Scale (1.25x Ratio)
| Size | Value | Calculation |
|---|---|---|
| xs | 10px | 16 ÷ 1.25² |
| sm | 13px | 16 ÷ 1.25¹ |
| base | 16px | Base |
| lg | 20px | 16 × 1.25¹ |
| xl | 25px | 16 × 1.25² |
| 2xl | 31px | 16 × 1.25³ |
| 3xl | 39px | 16 × 1.25⁴ |
| 4xl | 49px | 16 × 1.25⁵ |
| 5xl | 61px | 16 × 1.25⁶ |
WCAG Contrast Requirements
| Level | Normal Text | Large Text |
|---|---|---|
| AA | 4.5:1 | 3:1 |
| AAA | 7:1 | 4.5:1 |
Large text: ≥18pt regular or ≥14pt bold
Style Presets
| Aspect | Modern | Classic | Playful |
|---|---|---|---|
| Font Sans | Inter | Helvetica | Poppins |
| Font Mono | Fira Code | Courier | Source Code Pro |
| Radius Default | 8px | 4px | 16px |
| Shadows | Layered, subtle | Single layer | Soft, pronounced |
Knowledge Base
Detailed reference guides in references/:
| File | Content |
|---|---|
token-generation.md |
Color algorithms, HSV space, WCAG contrast, type scales |
component-architecture.md |
Atomic design, naming conventions, props patterns |
responsive-calculations.md |
Breakpoints, fluid typography, grid systems |
developer-handoff.md |
Export formats, framework setup, Figma sync |
Validation Checklist
Token Generation
- Brand color provided in hex format
- Style matches project requirements
- All token categories generated
- Semantic colors include contrast values
Component System
- All sizes implemented (sm, md, lg)
- All variants implemented (primary, secondary, ghost)
- All states working (hover, active, focus, disabled)
- Uses only design tokens (no hardcoded values)
Accessibility
- Color contrast meets WCAG AA
- Focus indicators visible
- Touch targets ≥ 44×44px
- Semantic HTML elements used
Developer Handoff
- Tokens exported in required format
- Framework integration documented
- Design tool synced
- Component documentation complete