Fix card colors in customization modal for better theme contrast - #333620

PR classified as team-member.

✅ Head commit e35ad02 is signed by hawkticehurst with trusted key EB4032D3FD72CDC87CB016DBCB38EEB71F4D1331 — approval requirement reduced from 2 to 1.

✅ Collaborator approvals: 1/1 (dmitrivMS).

✅ No newly added runnable binary files.

✅ No protected engineering system files changed.