"Are you sure you want to quit?" screen uses red background

The bug

The fix for MC-269446 appears to have made the "are you sure" screen use a red background, which is an unannounced change. I'm not sure if this is intended or not.

How to reproduce

1. Die
2. Attempt to quit the game

Expected results

Translucent grey background.

Actual results

Translucent red background.