In dark mode, instead of a fade-out effect, it appears as a hazy display

<img width="322" height="272" alt="Image" src="https://github.com/user-attachments/assets/33f39ef7-3709-4ba9-84a6-2546df1ed9fe" />

When running [ListOverflowWithFadeScroll](https://github.com/aterai/java-swing-tips/tree/main/examples/ListOverflowWithFadeScroll) in dark mode such as FlatDrkLaf, it appears as a white haze, as shown in the attached screenshot.