Sebastian Krüger
c544fbb6f2
Add comprehensive documentation and planning for Pastel UI: - Complete architecture design using Next.js 16 and Tailwind CSS 4 - Detailed development guide (CLAUDE.md) with all patterns and conventions - Feature-rich README with keyboard shortcuts and export formats - Project structure and technology stack decisions Features planned: - Color playground with multi-format support - Palette generation (harmony, distinct, gradient) - Accessibility tools (WCAG, color blindness simulation) - Named colors explorer (148 CSS/X11 colors) - Batch operations with CSV/JSON import/export - Command palette (Cmd+K) and keyboard shortcuts - Dark/light mode with system preference detection - Shareable links with URL state Tech stack: - Next.js 16 with App Router and Server Components - React 19 with latest concurrent features - Tailwind CSS 4 with CSS-first configuration - TypeScript strict mode - React Query for server state - Zustand for client state - Framer Motion for animations Ready for implementation phase. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
430 lines
13 KiB
Markdown
430 lines
13 KiB
Markdown
# Pastel UI
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> A modern, interactive web application for color manipulation, palette generation, and accessibility analysis.
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[](https://nextjs.org)
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[](https://react.dev)
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[](https://tailwindcss.com)
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[](https://www.typescriptlang.org)
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[](LICENSE)
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Pastel UI is a beautiful, feature-rich interface for the [Pastel API](https://github.com/valknarness/pastel-api), providing intuitive tools for color manipulation, palette generation, and accessibility testing.
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## Features
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### 🎨 Color Playground
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- **Interactive Color Picker** - Real-time color selection with live preview
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- **Multi-Format Support** - Hex, RGB, HSL, HSV, Lab, OkLab, LCH, OkLCH, CMYK, Gray, and 148 named colors
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- **Color Manipulation** - Lighten, darken, saturate, desaturate, rotate, complement, mix, grayscale
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- **Format Conversion** - Convert between any color format with one click
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- **Copy to Clipboard** - Quick copy for all formats
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### 🎭 Palette Generation
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- **Harmony Palettes** - Monochromatic, analogous, complementary, split-complementary, triadic, tetradic
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- **Distinct Colors** - Generate visually distinct colors using simulated annealing algorithm
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- **Gradient Creator** - Multi-stop gradients with color space selection (RGB, HSL, Lab, LCH, OkLab, OkLCH)
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- **Export Options** - CSS, JSON, Tailwind config, SCSS, SVG, PNG
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### ♿ Accessibility Tools
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- **WCAG Contrast Checker** - AA/AAA compliance analysis for text and backgrounds
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- **Color Blindness Simulator** - Protanopia, deuteranopia, tritanopia simulation
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- **Text Color Optimizer** - Find optimal text color for any background
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- **Batch Accessibility Testing** - Test entire palettes at once
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### 🔍 Color Analysis
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- **Perceptual Distance** - CIE76 and CIEDE2000 metrics
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- **Color Sorting** - Sort by hue, brightness, luminance, chroma
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- **Named Color Search** - Find nearest named color for any input
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- **Color Information** - Comprehensive color data in all formats
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### ⚡ Advanced Features
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- **Batch Operations** - Upload CSV/JSON, process multiple colors, download results
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- **Color History** - Track all colors used in your session
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- **Saved Palettes** - Persistent storage of your favorite palettes
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- **Command Palette** - Keyboard shortcuts (Cmd+K) for power users
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- **Dark/Light Mode** - System preference + manual toggle
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- **Shareable Links** - Share colors and palettes via URL
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## Tech Stack
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- **[Next.js 16](https://nextjs.org)** - React framework with App Router and Server Components
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- **[React 19](https://react.dev)** - Latest React with improved concurrent features
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- **[Tailwind CSS 4](https://tailwindcss.com)** - CSS-first utility framework with modern color spaces
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- **[TypeScript](https://www.typescriptlang.org)** - Strict type safety throughout
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- **[React Query](https://tanstack.com/query)** - Server state management and caching
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- **[Zustand](https://github.com/pmndrs/zustand)** - Client state management
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- **[Framer Motion](https://www.framer.com/motion/)** - Smooth animations and transitions
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- **[Lucide React](https://lucide.dev)** - Beautiful icon set
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## Quick Start
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### Prerequisites
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- **Node.js** 18+ (20+ recommended)
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- **pnpm** 9+ (or npm/yarn)
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- **Pastel API** running locally or remotely
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### Installation
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```bash
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# Clone the repository
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git clone git@github.com:valknarness/pastel-ui.git
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cd pastel-ui
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# Install dependencies
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pnpm install
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# Set up environment variables
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cp .env.example .env.local
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# Edit .env.local with your Pastel API URL
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# Run development server
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pnpm dev
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```
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Open [http://localhost:3000](http://localhost:3000) in your browser.
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### Environment Variables
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```bash
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# .env.local
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NEXT_PUBLIC_API_URL=http://localhost:3000 # Your Pastel API URL
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NEXT_PUBLIC_APP_URL=http://localhost:3000 # This app's URL (for sharing)
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```
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## Development
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### Available Commands
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```bash
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# Development
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pnpm dev # Start dev server (http://localhost:3000)
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pnpm dev:turbo # Start with Turbopack (faster)
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# Building
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pnpm build # Production build
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pnpm start # Start production server
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# Code Quality
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pnpm lint # Run ESLint
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pnpm lint:fix # Fix ESLint issues automatically
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pnpm format # Format code with Prettier
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pnpm type-check # TypeScript type checking
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# Testing
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pnpm test # Run unit tests (Vitest)
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pnpm test:ui # Vitest UI mode
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pnpm test:e2e # Run E2E tests (Playwright)
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pnpm test:e2e:ui # Playwright UI mode
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# Analysis
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pnpm analyze # Analyze bundle size
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```
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### Project Structure
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```
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pastel-ui/
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├── app/ # Next.js App Router
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│ ├── playground/ # Color manipulation tool
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│ ├── palettes/ # Palette generation
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│ ├── accessibility/ # Accessibility tools
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│ ├── names/ # Named colors explorer
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│ └── batch/ # Batch operations
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├── components/
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│ ├── ui/ # Base UI components
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│ ├── color/ # Color-specific components
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│ ├── tools/ # Tool components
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│ └── layout/ # Layout components
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├── lib/
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│ ├── api/ # API client and queries
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│ ├── utils/ # Utility functions
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│ ├── hooks/ # Custom React hooks
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│ └── stores/ # Zustand stores
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└── tests/ # Unit and E2E tests
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```
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See [CLAUDE.md](CLAUDE.md) for detailed architecture documentation.
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## Features Overview
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### Color Playground (`/`)
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The main interface for color manipulation:
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- Input colors in any format
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- View comprehensive color information
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- Manipulate colors with intuitive controls
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- Convert between formats instantly
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- Copy values with one click
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### Palette Generation (`/palettes`)
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Create beautiful color palettes:
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#### Harmony Palettes (`/palettes/harmony`)
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Generate palettes based on color theory:
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- **Monochromatic** - Variations of a single hue
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- **Analogous** - Adjacent colors on the wheel
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- **Complementary** - Opposite colors
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- **Split-complementary** - Base + two adjacent to complement
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- **Triadic** - Three evenly spaced colors
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- **Tetradic** - Four colors in a rectangle
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#### Distinct Colors (`/palettes/distinct`)
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Generate visually distinct colors using advanced algorithms:
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- Configurable count (2-100 colors)
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- Distance metric selection (CIE76, CIEDE2000)
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- Optional fixed colors to include
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- Real-time progress indicator
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#### Gradient Creator (`/palettes/gradient`)
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Create smooth color gradients:
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- Multiple color stops
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- Configurable step count
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- Color space selection for interpolation
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- Live preview
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- Export as CSS or color array
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### Accessibility Tools (`/accessibility`)
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Ensure your colors are accessible:
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#### Contrast Checker (`/accessibility/contrast`)
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- WCAG 2.1 compliance testing
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- AA/AAA ratings for normal and large text
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- Contrast ratio calculation
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- Improvement recommendations
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#### Color Blindness Simulator (`/accessibility/colorblind`)
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- Simulate protanopia (red-blind)
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- Simulate deuteranopia (green-blind)
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- Simulate tritanopia (blue-blind)
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- Side-by-side comparison
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- Batch palette testing
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### Named Colors Explorer (`/names`)
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Browse and search 148 CSS/X11 named colors:
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- Visual grid display
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- Search by name or hex value
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- Sort by hue, brightness, saturation, name
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- Find nearest named color for any input
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- Click to use in playground
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### Batch Operations (`/batch`)
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Process multiple colors efficiently:
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- Upload CSV/JSON files
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- Apply operations to all colors
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- Bulk format conversion
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- Visual preview of results
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- Download in multiple formats
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## Export Formats
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Export your colors and palettes in various formats:
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### CSS Variables
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```css
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:root {
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--color-primary: #ff0099;
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--color-secondary: #00ccff;
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--color-accent: #ffcc00;
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}
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```
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### Tailwind Config
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```javascript
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module.exports = {
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theme: {
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extend: {
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colors: {
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primary: '#ff0099',
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secondary: '#00ccff',
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accent: '#ffcc00',
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}
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}
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}
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}
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```
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### JSON
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```json
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{
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"colors": [
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{ "name": "primary", "hex": "#ff0099" },
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{ "name": "secondary", "hex": "#00ccff" },
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{ "name": "accent", "hex": "#ffcc00" }
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]
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}
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```
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### SCSS
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```scss
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$color-primary: #ff0099;
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$color-secondary: #00ccff;
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$color-accent: #ffcc00;
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```
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## Keyboard Shortcuts
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| Shortcut | Action |
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|----------|--------|
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| `Cmd/Ctrl + K` | Open command palette |
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| `Cmd/Ctrl + C` | Copy current color (hex) |
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| `Cmd/Ctrl + V` | Paste color from clipboard |
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| `Cmd/Ctrl + Z` | Undo color change |
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| `Cmd/Ctrl + Shift + Z` | Redo color change |
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| `Cmd/Ctrl + D` | Toggle dark/light mode |
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| `Cmd/Ctrl + /` | Show keyboard shortcuts |
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| `Esc` | Close modals/dialogs |
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| `Arrow Keys` | Navigate color history |
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| `Space` | Toggle color picker |
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## API Integration
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Pastel UI communicates with the [Pastel API](https://github.com/valknarness/pastel-api) for all color operations. The API client is type-safe and includes automatic retries, caching, and error handling.
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### Example API Usage
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```typescript
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import { pastelAPI } from '@/lib/api/client';
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// Get color information
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const info = await pastelAPI.getColorInfo(['#ff0099']);
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// Generate distinct colors
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const distinct = await pastelAPI.generateDistinct(8, 'ciede2000');
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// Create gradient
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const gradient = await pastelAPI.generateGradient({
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stops: ['#ff0000', '#0000ff'],
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count: 10,
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colorspace: 'lch'
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});
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```
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See [CLAUDE.md](CLAUDE.md) for detailed API integration documentation.
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## Performance
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Pastel UI is optimized for performance:
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- **Fast Initial Load** - < 200KB initial bundle
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- **Code Splitting** - Route-based automatic splitting
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- **Image Optimization** - Next.js Image with AVIF/WebP
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- **API Caching** - React Query with smart cache invalidation
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- **Debounced Updates** - Smooth slider interactions
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- **Web Workers** - Heavy calculations off main thread
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## Accessibility
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Pastel UI meets WCAG 2.1 Level AAA standards:
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- **Keyboard Navigation** - Full keyboard support
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- **Screen Reader Support** - Comprehensive ARIA labels
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- **Focus Management** - Logical focus order
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- **Color Contrast** - AAA contrast throughout
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- **Reduced Motion** - Respects user preferences
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- **Semantic HTML** - Proper HTML structure
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## Browser Support
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- **Chrome/Edge** 90+
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- **Firefox** 88+
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- **Safari** 14+
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- **Mobile Safari** 14+
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- **Chrome Android** 90+
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## Deployment
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### Vercel (Recommended)
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[](https://vercel.com/new/clone?repository-url=https://github.com/valknarness/pastel-ui)
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```bash
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# Install Vercel CLI
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pnpm add -g vercel
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# Deploy
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vercel
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# Production deployment
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vercel --prod
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```
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### Docker
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```bash
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# Build
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docker build -t pastel-ui .
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# Run
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docker run -p 3000:3000 -e NEXT_PUBLIC_API_URL=https://api.pastel.com pastel-ui
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```
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### Static Export
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```bash
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# Build static export
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pnpm build
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# Output in out/ directory
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# Deploy to any static hosting (Netlify, Cloudflare Pages, etc.)
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```
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## Contributing
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Contributions are welcome! Please read [CLAUDE.md](CLAUDE.md) for development guidelines.
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### Development Workflow
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1. Fork the repository
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2. Create a feature branch (`git checkout -b feature/amazing-feature`)
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3. Make your changes
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4. Run tests (`pnpm test`)
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5. Commit your changes (`git commit -m 'Add amazing feature'`)
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6. Push to the branch (`git push origin feature/amazing-feature`)
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7. Open a Pull Request
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### PR Checklist
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- [ ] Tests pass (`pnpm test` and `pnpm test:e2e`)
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- [ ] No linting errors (`pnpm lint`)
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- [ ] No TypeScript errors (`pnpm type-check`)
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- [ ] Code formatted (`pnpm format`)
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- [ ] Documentation updated (if needed)
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- [ ] Accessibility tested (keyboard, screen reader)
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- [ ] Performance checked (`pnpm analyze`)
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## Related Projects
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- **[Pastel API](https://github.com/valknarness/pastel-api)** - REST API for color manipulation
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- **[Pastel CLI](https://github.com/sharkdp/pastel)** - Original command-line tool by David Peter
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## License
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MIT License - see [LICENSE](LICENSE) file for details.
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## Acknowledgments
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- **[David Peter](https://github.com/sharkdp)** - Creator of the original [Pastel CLI](https://github.com/sharkdp/pastel)
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- **[Vercel](https://vercel.com)** - Next.js framework and hosting platform
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- **[Tailwind Labs](https://tailwindcss.com)** - Tailwind CSS framework
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- Color science resources from [OkLab](https://bottosson.github.io/posts/oklab/) and [W3C](https://www.w3.org/WAI/WCAG21/)
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## Support
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- **Documentation**: [CLAUDE.md](CLAUDE.md)
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- **API Docs**: [Pastel API](https://github.com/valknarness/pastel-api)
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- **Issues**: [GitHub Issues](https://github.com/valknarness/pastel-ui/issues)
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- **Discussions**: [GitHub Discussions](https://github.com/valknarness/pastel-ui/discussions)
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---
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**Built with** ❤️ **using** [Next.js](https://nextjs.org), [React](https://react.dev), and [Tailwind CSS](https://tailwindcss.com)
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**Project Status**: Design phase complete, ready for implementation
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**Last Updated**: 2025-11-07
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