Release v0.1.6 - Color Converter New Features: - Color::adjustBrightness() - Adjust hex color brightness by percentage - Color::hexToRgb() - Convert hex to RGB string - Color::hexToRgbArray() - Convert hex to RGB array - Color::rgbToHex() - Convert RGB to hex - Color::isValidHex() - Validate hex color codes - Color::getContrastColor() - WCAG-compliant contrast color detection All methods include full type safety, validation, and comprehensive test coverage.