How in PhpStorm 2024 change background color of nonexisting class?

In PhpStorm having error with undefined class of my php code:

Where can I change of background color to see error more clearly ? Now I can hardly distinguish background color of error ...

I searched in setting options, but did not find.

I use latest PhpStorm 2024.2 version.

Step 1: Open Settings Open the Settings dialog by pressing Ctrl + Shift + Alt + S (Windows/Linux) or Cmd + Shift + Alt + S (macOS).

Step 2: Navigate to Editor Settings In the Settings dialog, navigate to Editor > Color Scheme > General.

Step 3: Find "Invalid Symbol" Highlighting In the General settings, scroll down to the "Invalid symbol" section.

Step 4: Change Background Color Click on the "Background" field and select a new color from the palette. You can also enter a custom color code.

Step 5: Apply Changes Click "Apply" and then "OK" to close the Settings dialog.

Step 6: Restart PhpStorm (Optional) If the changes don't take effect immediately, try restarting PhpStorm.

After following these steps, non-existent classes should be highlighted with the new background color you selected.