iOS semantic system colors, dark mode, and material levels per Apple HIG (current iOS 26). Covers why you never hard-code system color values, the system vs grouped background sets, label/separator colors, dark mode base-vs-elevated + the 4.5:1/7:1 contrast floors, the four standard material levels
iOS semantic system colors, dark mode, and material levels per Apple HIG (current iOS 26). Covers why you never hard-code system color values, the system vs grouped background sets, label/separator colors, dark mode base-vs-elevated + the 4.5:1/7:1 contrast floors, the four standard material levels + vibrancy, Liquid Glass color rules, and Display P3. Use when choosing colors, backgrounds, or mate