The min/max button hover was set to #FFFFFF22, intended as "white at
13% alpha". WPF Color literals are AARRGGBB though, not RRGGBBAA, so
that's actually opaque red+green+a-touch-of-blue → yellow-ish white,
unreadable on the dark chrome.
Switch to Brush.Accent (#3B82F6) on hover with white foreground,
matching the close button red on hover (#E81123) — both controls now
have clear, distinct hover states.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>