# Test Coverage

- [x] Renders Hex input correctly.
- [x] Renders Alpha slider when `showAlpha` is true.
- [x] Syncs Hex input with slider.
- [x] Validates Hex length (7 chars).
- [x] Handles invalid Hex input (does not break UI).
- [x] Normalizes `#ffffff` (alpha 1) vs `#ffffff00` (alpha 0).