Black background isn't displayed correctly in PowerShell

[EmilyGraceSeville7cf]

Environment

Windows build number: Win32NT 10.0.19042.0 Microsoft Windows NT 10.0.19042.0
Windows Terminal version (if applicable): 1.5.10271.0

Steps to reproduce

If you execute this code peace than you see yellow text with white background instead of yellow text with black background.

 Write-Host "TextToOutput" -ForegroundColor Yellow -BackgroundColor Black

Expected behavior

Yellow text with black background.

Actual behavior

Yellow text with white background.

[DHowett]

Unfortunately, this is by design. PowerShell erroneously tells us to use a black background so often that it would cause there to be black streaks across the display (even if the terminal background was set to white or acrylic transparency.)

We had to disable black for PowerShell, specifically. #6810. Tracking the "fix" in /dup #6807.

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!

[KalleOlaviNiemitalo]

I presume it is caused by #6810, i.e. PowerShell asks for a black background when it really wants a default background, and Windows Terminal tries to work around that by recognising the powershell.exe name and giving it the default background when it asks for a black background.