UI Design Skill (Web)

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MANDATORY: WCAG 2.1 AA Compliance

These rules are NON-NEGOTIABLE. Every UI element must pass these checks.

1. Color Contrast (CRITICAL)

Text Contrast Requirements:
├── Normal text (<18px): 4.5:1 minimum
├── Large text (≥18px bold or ≥24px): 3:1 minimum
├── UI components (buttons, inputs): 3:1 minimum
└── Focus indicators: 3:1 minimum

FORBIDDEN COLOR COMBINATIONS:
✗ gray-400 on white (#9CA3AF on #FFFFFF = 2.6:1) - FAILS
✗ gray-500 on white (#6B7280 on #FFFFFF = 4.6:1) - BARELY PASSES
✗ white on yellow - FAILS
✗ light blue on white - USUALLY FAILS

SAFE COLOR COMBINATIONS:
✓ gray-700 on white (#374151 on #FFFFFF = 9.2:1)
✓ gray-600 on white (#4B5563 on #FFFFFF = 6.4:1)
✓ gray-900 on white (#111827 on #FFFFFF = 16:1)
✓ white on gray-900, blue-600, green-700

2. Visibility Rules (CRITICAL)

ALL BUTTONS MUST HAVE:
✓ Visible background color OR visible border (min 1px)
✓ Text color that contrasts with background
✓ Minimum height: 44px (touch target)
✓ Padding: at least px-4 py-2

NEVER CREATE:
✗ Buttons with transparent background AND no border
✗ Text same color as background
✗ Ghost buttons without visible borders
✗ White text on light backgrounds
✗ Dark text on dark backgrounds

3. Required Element Styles

// EVERY button needs visible boundaries
// PRIMARY: solid background
<button className="bg-gray-900 text-white px-4 py-3 rounded-lg">
  Primary
</button>

// SECONDARY: visible background
<button className="bg-gray-100 text-gray-900 px-4 py-3 rounded-lg">
  Secondary
</button>

// GHOST: MUST have visible border
<button className="border border-gray-300 text-gray-700 px-4 py-3 rounded-lg">
  Ghost
</button>

// NEVER DO THIS:
<button className="text-gray-500">Invisible Button</button> // ✗ NO BOUNDARY
<button className="bg-white text-white">Hidden</button>     // ✗ NO CONTRAST

4. Focus States (REQUIRED)

// EVERY interactive element needs visible focus
className="focus:outline-none focus-visible:ring-2 focus-visible:ring-blue-500 focus-visible:ring-offset-2"

// NEVER remove focus without replacement
className="outline-none" // ✗ FORBIDDEN without ring replacement

5. Dark Mode Contrast

When implementing dark mode:
├── Text must be light (gray-100 to white) on dark backgrounds
├── Borders must be visible (gray-700 or lighter)
├── Never use gray-400 text on gray-900 bg (fails contrast)
└── Test BOTH modes before shipping

SAFE DARK MODE TEXT:
✓ text-white on bg-gray-900
✓ text-gray-100 on bg-gray-800
✓ text-gray-200 on bg-gray-900

UNSAFE (FAILS CONTRAST):
✗ text-gray-500 on bg-gray-900 (2.4:1)
✗ text-gray-400 on bg-gray-800 (3.1:1)

Core Philosophy

Beautiful UI is not decoration - it's communication. Every visual choice should serve clarity, hierarchy, and user confidence. Default to elegance and restraint.

Design Principles

1. Visual Hierarchy

Primary Action    → Bold, high contrast, prominent
Secondary Action  → Subtle, lower contrast
Tertiary/Links    → Minimal, text-style

2. Spacing System (8px Grid)

// Tailwind spacing scale - USE CONSISTENTLY
const spacing = {
  xs: 'p-1',      // 4px  - tight internal
  sm: 'p-2',      // 8px  - compact
  md: 'p-4',      // 16px - default
  lg: 'p-6',      // 24px - comfortable
  xl: 'p-8',      // 32px - spacious
  '2xl': 'p-12',  // 48px - section gaps
};

// Rule: More whitespace = more premium feel
// Rule: Consistent spacing > perfect spacing

3. Typography Scale

// Limit to 3-4 font sizes per page
const typography = {
  hero: 'text-4xl md:text-5xl font-bold tracking-tight',
  heading: 'text-2xl md:text-3xl font-semibold',
  subheading: 'text-lg md:text-xl font-medium',
  body: 'text-base leading-relaxed',
  caption: 'text-sm text-gray-500',
};

// Rule: Never use more than 2 font families
// Rule: Line height 1.5-1.7 for body text

Glassmorphism (Web)

Base Glass Card

// Modern glass effect - use sparingly for emphasis
const GlassCard = ({ children, className = '' }) => (
  <div className={`
    backdrop-blur-xl
    bg-white/10
    border border-white/20
    rounded-2xl
    shadow-xl
    shadow-black/5
    ${className}
  `}>
    {children}
  </div>
);

Glass Variants

// Light mode glass
const lightGlass = `
  backdrop-blur-xl
  bg-white/70
  border border-white/50
  shadow-lg shadow-gray-200/50
`;

// Dark mode glass
const darkGlass = `
  backdrop-blur-xl
  bg-gray-900/70
  border border-white/10
  shadow-xl shadow-black/20
`;

// Frosted sidebar
const frostedSidebar = `
  backdrop-blur-2xl
  bg-gradient-to-b from-white/80 to-white/60
  border-r border-white/30
`;

// Floating action glass
const floatingGlass = `
  backdrop-blur-md
  bg-white/90
  rounded-full
  shadow-lg shadow-black/10
  border border-white/50
`;

When to Use Glassmorphism

✓ Hero sections with image backgrounds
✓ Floating cards over gradients
✓ Modal overlays
✓ Navigation bars (subtle)
✓ Feature highlights

✗ Every card (overuse kills the effect)
✗ Text-heavy content areas
✗ Forms (reduces contrast)
✗ Data tables

Color System

Semantic Colors

const colors = {
  // Actions
  primary: 'bg-blue-600 hover:bg-blue-700',
  secondary: 'bg-gray-100 hover:bg-gray-200 text-gray-900',
  danger: 'bg-red-600 hover:bg-red-700',
  success: 'bg-green-600 hover:bg-green-700',

  // Surfaces
  background: 'bg-gray-50 dark:bg-gray-950',
  surface: 'bg-white dark:bg-gray-900',
  elevated: 'bg-white dark:bg-gray-800 shadow-lg',

  // Text
  textPrimary: 
how to use ui-web
CursorClaude CodeClineCodexWindsurfGooseGitHub CopilotVS CodeGemini CLIKiloOpencodeKimi CLIRoo ClineAiderContinueZedBolt.newLovablev0Replit AgentSweepSmol DeveloperDevinCavemanAmpAntigravity
How to use ui-web on Cursor
AI-first code editor with Composer
1
Prerequisites
Before installing skills in Cursor, ensure your development environment meets these requirements:
›Cursor installed and configured on your development machine
›Node.js version 16.0+ with npm package manager (verify with node --version)
›Active project directory or workspace where you want to add ui-web
2
Execute installation command
Execute the skills CLI command in your project's root directory to begin installation:
$npx skills add https://github.com/alinaqi/claude-bootstrap --skill ui-webcopy
The skills CLI fetches ui-web from GitHub repository alinaqi/claude-bootstrap and configures it for Cursor.
3
Select Cursor when prompted
The CLI will show a list of available agents. Use arrow keys to navigate and space to select Cursor:
◆ Which agents do you want to install to?
│
│ ── Universal (.agents/skills) ── always included ────
│   • Amp
│   • Antigravity
│   • Cline
│   • Codex
│ ●Cursor(selected)
│   • Cursor
│   • Windsurf
4
Verify installation
Confirm successful installation by checking the skill directory location:
.cursor/skills/ui-web
Reload or restart Cursor to activate ui-web. Access the skill through slash commands (e.g., /ui-web) or your agent's skill management interface.
⚠
Security & Verification Notice
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
Skills execute code in your development environment. Always verify the publisher's identity, review recent commits, and test in isolated environments before production deployment.
Additional Resources
›View source code on GitHub›Skills CLI documentation›Learn more about Cursor›What are agent skills?