Apple Human Interface Guidelines — Quick Reference

When to Use This Skill

Use when:

• Making visual design decisions (colors, backgrounds, typography)
• Reviewing UI for HIG compliance
• Answering "Should I use a dark background?"
• Choosing between design options
• Defending design decisions to stakeholders
• Quick lookups for common design questions

Related Skills

• Use swiftui-liquid-glass for iOS 26 Liquid Glass implementation guidance
• Use swiftui-26-ref for design system changes across platforms
• Use typography-ref for typography rules and Dynamic Type specifics